Replace getauxval() with getauxptr() when building the tests for purecap. By building the vDSO selftests as purecap binaries, we can test the purecap vDSO.
Signed-off-by: Aditya Deshpande aditya.deshpande@arm.com --- tools/testing/selftests/vDSO/parse_vdso.h | 16 ++++++++++++++++ tools/testing/selftests/vDSO/vdso_test_abi.c | 5 +++-- .../selftests/vDSO/vdso_test_gettimeofday.c | 6 ++---- 3 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/vDSO/parse_vdso.h b/tools/testing/selftests/vDSO/parse_vdso.h index de0453067d7c..58f3df88160d 100644 --- a/tools/testing/selftests/vDSO/parse_vdso.h +++ b/tools/testing/selftests/vDSO/parse_vdso.h @@ -4,6 +4,7 @@ #define PARSE_VDSO_H
#include <stdint.h> +#include <stdlib.h>
/* * To use this vDSO parser, first call one of the vdso_init_* functions. @@ -28,4 +29,19 @@ void *vdso_sym(const char *version, const char *name); void vdso_init_from_sysinfo_ehdr(uintptr_t base); void vdso_init_from_auxv(void *auxv);
+/* + * Under PCuABI, pointers in the auxiliary vector can no longer be represented + * as unsigned long as they are now capabilities. Get the capability to the + * vDSO using getauxptr() instead, which returns a a capability instead of + * unsigned long. + */ +static inline uintptr_t get_sysinfo_ehdr() +{ +#ifdef __CHERI_PURE_CAPABILITY__ + return getauxptr(AT_SYSINFO_EHDR); +#else + return (uintptr_t)getauxval(AT_SYSINFO_EHDR); +#endif +} + #endif diff --git a/tools/testing/selftests/vDSO/vdso_test_abi.c b/tools/testing/selftests/vDSO/vdso_test_abi.c index 883ca85424bc..091efeaa3172 100644 --- a/tools/testing/selftests/vDSO/vdso_test_abi.c +++ b/tools/testing/selftests/vDSO/vdso_test_abi.c @@ -20,6 +20,7 @@
#include "../kselftest.h" #include "vdso_config.h" +#include "parse_vdso.h"
extern void *vdso_sym(const char *version, const char *name); extern void vdso_init_from_sysinfo_ehdr(uintptr_t base); @@ -175,7 +176,7 @@ static inline void vdso_test_clock(clockid_t clock_id)
int main(int argc, char **argv) { - unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR); + uintptr_t sysinfo_ehdr = get_sysinfo_ehdr();
ksft_print_header(); ksft_set_plan(VDSO_TEST_PLAN); @@ -190,7 +191,7 @@ int main(int argc, char **argv)
printf("[vDSO kselftest] VDSO_VERSION: %s\n", version);
- vdso_init_from_sysinfo_ehdr(getauxval(AT_SYSINFO_EHDR)); + vdso_init_from_sysinfo_ehdr(sysinfo_ehdr);
vdso_test_gettimeofday();
diff --git a/tools/testing/selftests/vDSO/vdso_test_gettimeofday.c b/tools/testing/selftests/vDSO/vdso_test_gettimeofday.c index e411f287a426..359f881ac574 100644 --- a/tools/testing/selftests/vDSO/vdso_test_gettimeofday.c +++ b/tools/testing/selftests/vDSO/vdso_test_gettimeofday.c @@ -37,14 +37,12 @@ const char *name = "__vdso_gettimeofday";
int main(int argc, char **argv) { - unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR); + uintptr_t sysinfo_ehdr = get_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)); - + vdso_init_from_sysinfo_ehdr(sysinfo_ehdr); /* Find gettimeofday. */ typedef long (*gtod_t)(struct timeval *tv, struct timezone *tz); gtod_t gtod = (gtod_t)vdso_sym(version, name);