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-rw-r--r--tools/testing/selftests/x86/test_vsyscall.c356
1 files changed, 168 insertions, 188 deletions
diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index c78b0648aa52..d4c8e8d79d38 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -24,6 +24,12 @@
#include "../kselftest.h"
#ifdef __x86_64__
+#define TOTAL_TESTS 13
+#else
+#define TOTAL_TESTS 8
+#endif
+
+#ifdef __x86_64__
# define VSYS(x) (x)
#else
# define VSYS(x) 0
@@ -64,25 +70,25 @@ static void init_vdso(void)
if (!vdso)
vdso = dlopen("linux-gate.so.1", RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
if (!vdso) {
- printf("[WARN]\tfailed to find vDSO\n");
+ ksft_print_msg("[WARN] failed to find vDSO\n");
return;
}
vdso_gtod = (gtod_t)dlsym(vdso, "__vdso_gettimeofday");
if (!vdso_gtod)
- printf("[WARN]\tfailed to find gettimeofday in vDSO\n");
+ ksft_print_msg("[WARN] failed to find gettimeofday in vDSO\n");
vdso_gettime = (vgettime_t)dlsym(vdso, "__vdso_clock_gettime");
if (!vdso_gettime)
- printf("[WARN]\tfailed to find clock_gettime in vDSO\n");
+ ksft_print_msg("[WARN] failed to find clock_gettime in vDSO\n");
vdso_time = (time_func_t)dlsym(vdso, "__vdso_time");
if (!vdso_time)
- printf("[WARN]\tfailed to find time in vDSO\n");
+ ksft_print_msg("[WARN] failed to find time in vDSO\n");
vdso_getcpu = (getcpu_t)dlsym(vdso, "__vdso_getcpu");
if (!vdso_getcpu)
- printf("[WARN]\tfailed to find getcpu in vDSO\n");
+ ksft_print_msg("[WARN] failed to find getcpu in vDSO\n");
}
/* syscalls */
@@ -113,81 +119,70 @@ static double tv_diff(const struct timeval *a, const struct timeval *b)
(double)((int)a->tv_usec - (int)b->tv_usec) * 1e-6;
}
-static int check_gtod(const struct timeval *tv_sys1,
- const struct timeval *tv_sys2,
- const struct timezone *tz_sys,
- const char *which,
- const struct timeval *tv_other,
- const struct timezone *tz_other)
+static void check_gtod(const struct timeval *tv_sys1,
+ const struct timeval *tv_sys2,
+ const struct timezone *tz_sys,
+ const char *which,
+ const struct timeval *tv_other,
+ const struct timezone *tz_other)
{
- int nerrs = 0;
double d1, d2;
- if (tz_other && (tz_sys->tz_minuteswest != tz_other->tz_minuteswest || tz_sys->tz_dsttime != tz_other->tz_dsttime)) {
- printf("[FAIL] %s tz mismatch\n", which);
- nerrs++;
- }
+ if (tz_other && (tz_sys->tz_minuteswest != tz_other->tz_minuteswest ||
+ tz_sys->tz_dsttime != tz_other->tz_dsttime))
+ ksft_print_msg("%s tz mismatch\n", which);
d1 = tv_diff(tv_other, tv_sys1);
d2 = tv_diff(tv_sys2, tv_other);
- printf("\t%s time offsets: %lf %lf\n", which, d1, d2);
- if (d1 < 0 || d2 < 0) {
- printf("[FAIL]\t%s time was inconsistent with the syscall\n", which);
- nerrs++;
- } else {
- printf("[OK]\t%s gettimeofday()'s timeval was okay\n", which);
- }
+ ksft_print_msg("%s time offsets: %lf %lf\n", which, d1, d2);
- return nerrs;
+ ksft_test_result(!(d1 < 0 || d2 < 0), "%s gettimeofday()'s timeval\n", which);
}
-static int test_gtod(void)
+static void test_gtod(void)
{
struct timeval tv_sys1, tv_sys2, tv_vdso, tv_vsys;
struct timezone tz_sys, tz_vdso, tz_vsys;
long ret_vdso = -1;
long ret_vsys = -1;
- int nerrs = 0;
- printf("[RUN]\ttest gettimeofday()\n");
+ ksft_print_msg("test gettimeofday()\n");
if (sys_gtod(&tv_sys1, &tz_sys) != 0)
- err(1, "syscall gettimeofday");
+ ksft_exit_fail_msg("syscall gettimeofday: %s\n", strerror(errno));
if (vdso_gtod)
ret_vdso = vdso_gtod(&tv_vdso, &tz_vdso);
if (vsyscall_map_x)
ret_vsys = vgtod(&tv_vsys, &tz_vsys);
if (sys_gtod(&tv_sys2, &tz_sys) != 0)
- err(1, "syscall gettimeofday");
+ ksft_exit_fail_msg("syscall gettimeofday: %s\n", strerror(errno));
if (vdso_gtod) {
- if (ret_vdso == 0) {
- nerrs += check_gtod(&tv_sys1, &tv_sys2, &tz_sys, "vDSO", &tv_vdso, &tz_vdso);
- } else {
- printf("[FAIL]\tvDSO gettimeofday() failed: %ld\n", ret_vdso);
- nerrs++;
- }
+ if (ret_vdso == 0)
+ check_gtod(&tv_sys1, &tv_sys2, &tz_sys, "vDSO", &tv_vdso, &tz_vdso);
+ else
+ ksft_test_result_fail("vDSO gettimeofday() failed: %ld\n", ret_vdso);
+ } else {
+ ksft_test_result_skip("vdso_gtod isn't set\n");
}
if (vsyscall_map_x) {
- if (ret_vsys == 0) {
- nerrs += check_gtod(&tv_sys1, &tv_sys2, &tz_sys, "vsyscall", &tv_vsys, &tz_vsys);
- } else {
- printf("[FAIL]\tvsys gettimeofday() failed: %ld\n", ret_vsys);
- nerrs++;
- }
+ if (ret_vsys == 0)
+ check_gtod(&tv_sys1, &tv_sys2, &tz_sys, "vsyscall", &tv_vsys, &tz_vsys);
+ else
+ ksft_test_result_fail("vsys gettimeofday() failed: %ld\n", ret_vsys);
+ } else {
+ ksft_test_result_skip("vsyscall_map_x isn't set\n");
}
-
- return nerrs;
}
-static int test_time(void) {
- int nerrs = 0;
-
- printf("[RUN]\ttest time()\n");
+static void test_time(void)
+{
long t_sys1, t_sys2, t_vdso = 0, t_vsys = 0;
long t2_sys1 = -1, t2_sys2 = -1, t2_vdso = -1, t2_vsys = -1;
+
+ ksft_print_msg("test time()\n");
t_sys1 = sys_time(&t2_sys1);
if (vdso_time)
t_vdso = vdso_time(&t2_vdso);
@@ -195,56 +190,60 @@ static int test_time(void) {
t_vsys = vtime(&t2_vsys);
t_sys2 = sys_time(&t2_sys2);
if (t_sys1 < 0 || t_sys1 != t2_sys1 || t_sys2 < 0 || t_sys2 != t2_sys2) {
- printf("[FAIL]\tsyscall failed (ret1:%ld output1:%ld ret2:%ld output2:%ld)\n", t_sys1, t2_sys1, t_sys2, t2_sys2);
- nerrs++;
- return nerrs;
+ ksft_print_msg("syscall failed (ret1:%ld output1:%ld ret2:%ld output2:%ld)\n",
+ t_sys1, t2_sys1, t_sys2, t2_sys2);
+ ksft_test_result_skip("vdso_time\n");
+ ksft_test_result_skip("vdso_time\n");
+ return;
}
if (vdso_time) {
- if (t_vdso < 0 || t_vdso != t2_vdso) {
- printf("[FAIL]\tvDSO failed (ret:%ld output:%ld)\n", t_vdso, t2_vdso);
- nerrs++;
- } else if (t_vdso < t_sys1 || t_vdso > t_sys2) {
- printf("[FAIL]\tvDSO returned the wrong time (%ld %ld %ld)\n", t_sys1, t_vdso, t_sys2);
- nerrs++;
- } else {
- printf("[OK]\tvDSO time() is okay\n");
- }
+ if (t_vdso < 0 || t_vdso != t2_vdso)
+ ksft_test_result_fail("vDSO failed (ret:%ld output:%ld)\n",
+ t_vdso, t2_vdso);
+ else if (t_vdso < t_sys1 || t_vdso > t_sys2)
+ ksft_test_result_fail("vDSO returned the wrong time (%ld %ld %ld)\n",
+ t_sys1, t_vdso, t_sys2);
+ else
+ ksft_test_result_pass("vDSO time() is okay\n");
+ } else {
+ ksft_test_result_skip("vdso_time isn't set\n");
}
if (vsyscall_map_x) {
- if (t_vsys < 0 || t_vsys != t2_vsys) {
- printf("[FAIL]\tvsyscall failed (ret:%ld output:%ld)\n", t_vsys, t2_vsys);
- nerrs++;
- } else if (t_vsys < t_sys1 || t_vsys > t_sys2) {
- printf("[FAIL]\tvsyscall returned the wrong time (%ld %ld %ld)\n", t_sys1, t_vsys, t_sys2);
- nerrs++;
- } else {
- printf("[OK]\tvsyscall time() is okay\n");
- }
+ if (t_vsys < 0 || t_vsys != t2_vsys)
+ ksft_test_result_fail("vsyscall failed (ret:%ld output:%ld)\n",
+ t_vsys, t2_vsys);
+ else if (t_vsys < t_sys1 || t_vsys > t_sys2)
+ ksft_test_result_fail("vsyscall returned the wrong time (%ld %ld %ld)\n",
+ t_sys1, t_vsys, t_sys2);
+ else
+ ksft_test_result_pass("vsyscall time() is okay\n");
+ } else {
+ ksft_test_result_skip("vsyscall_map_x isn't set\n");
}
-
- return nerrs;
}
-static int test_getcpu(int cpu)
+static void test_getcpu(int cpu)
{
- int nerrs = 0;
+ unsigned int cpu_sys, cpu_vdso, cpu_vsys, node_sys, node_vdso, node_vsys;
long ret_sys, ret_vdso = -1, ret_vsys = -1;
+ unsigned int node = 0;
+ bool have_node = false;
+ cpu_set_t cpuset;
- printf("[RUN]\tgetcpu() on CPU %d\n", cpu);
+ ksft_print_msg("getcpu() on CPU %d\n", cpu);
- cpu_set_t cpuset;
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
if (sched_setaffinity(0, sizeof(cpuset), &cpuset) != 0) {
- printf("[SKIP]\tfailed to force CPU %d\n", cpu);
- return nerrs;
+ ksft_print_msg("failed to force CPU %d\n", cpu);
+ ksft_test_result_skip("vdso_getcpu\n");
+ ksft_test_result_skip("vsyscall_map_x\n");
+
+ return;
}
- unsigned cpu_sys, cpu_vdso, cpu_vsys, node_sys, node_vdso, node_vsys;
- unsigned node = 0;
- bool have_node = false;
ret_sys = sys_getcpu(&cpu_sys, &node_sys, 0);
if (vdso_getcpu)
ret_vdso = vdso_getcpu(&cpu_vdso, &node_vdso, 0);
@@ -252,10 +251,9 @@ static int test_getcpu(int cpu)
ret_vsys = vgetcpu(&cpu_vsys, &node_vsys, 0);
if (ret_sys == 0) {
- if (cpu_sys != cpu) {
- printf("[FAIL]\tsyscall reported CPU %hu but should be %d\n", cpu_sys, cpu);
- nerrs++;
- }
+ if (cpu_sys != cpu)
+ ksft_print_msg("syscall reported CPU %hu but should be %d\n",
+ cpu_sys, cpu);
have_node = true;
node = node_sys;
@@ -263,57 +261,53 @@ static int test_getcpu(int cpu)
if (vdso_getcpu) {
if (ret_vdso) {
- printf("[FAIL]\tvDSO getcpu() failed\n");
- nerrs++;
+ ksft_test_result_fail("vDSO getcpu() failed\n");
} else {
if (!have_node) {
have_node = true;
node = node_vdso;
}
- if (cpu_vdso != cpu) {
- printf("[FAIL]\tvDSO reported CPU %hu but should be %d\n", cpu_vdso, cpu);
- nerrs++;
- } else {
- printf("[OK]\tvDSO reported correct CPU\n");
- }
-
- if (node_vdso != node) {
- printf("[FAIL]\tvDSO reported node %hu but should be %hu\n", node_vdso, node);
- nerrs++;
+ if (cpu_vdso != cpu || node_vdso != node) {
+ if (cpu_vdso != cpu)
+ ksft_print_msg("vDSO reported CPU %hu but should be %d\n",
+ cpu_vdso, cpu);
+ if (node_vdso != node)
+ ksft_print_msg("vDSO reported node %hu but should be %hu\n",
+ node_vdso, node);
+ ksft_test_result_fail("Wrong values\n");
} else {
- printf("[OK]\tvDSO reported correct node\n");
+ ksft_test_result_pass("vDSO reported correct CPU and node\n");
}
}
+ } else {
+ ksft_test_result_skip("vdso_getcpu isn't set\n");
}
if (vsyscall_map_x) {
if (ret_vsys) {
- printf("[FAIL]\tvsyscall getcpu() failed\n");
- nerrs++;
+ ksft_test_result_fail("vsyscall getcpu() failed\n");
} else {
if (!have_node) {
have_node = true;
node = node_vsys;
}
- if (cpu_vsys != cpu) {
- printf("[FAIL]\tvsyscall reported CPU %hu but should be %d\n", cpu_vsys, cpu);
- nerrs++;
+ if (cpu_vsys != cpu || node_vsys != node) {
+ if (cpu_vsys != cpu)
+ ksft_print_msg("vsyscall reported CPU %hu but should be %d\n",
+ cpu_vsys, cpu);
+ if (node_vsys != node)
+ ksft_print_msg("vsyscall reported node %hu but should be %hu\n",
+ node_vsys, node);
+ ksft_test_result_fail("Wrong values\n");
} else {
- printf("[OK]\tvsyscall reported correct CPU\n");
- }
-
- if (node_vsys != node) {
- printf("[FAIL]\tvsyscall reported node %hu but should be %hu\n", node_vsys, node);
- nerrs++;
- } else {
- printf("[OK]\tvsyscall reported correct node\n");
+ ksft_test_result_pass("vsyscall reported correct CPU and node\n");
}
}
+ } else {
+ ksft_test_result_skip("vsyscall_map_x isn't set\n");
}
-
- return nerrs;
}
#ifdef __x86_64__
@@ -325,12 +319,13 @@ static void sethandler(int sig, void (*handler)(int, siginfo_t *, void *),
int flags)
{
struct sigaction sa;
+
memset(&sa, 0, sizeof(sa));
sa.sa_sigaction = handler;
sa.sa_flags = SA_SIGINFO | flags;
sigemptyset(&sa.sa_mask);
if (sigaction(sig, &sa, 0))
- err(1, "sigaction");
+ ksft_exit_fail_msg("sigaction failed\n");
}
static void sigsegv(int sig, siginfo_t *info, void *ctx_void)
@@ -341,9 +336,9 @@ static void sigsegv(int sig, siginfo_t *info, void *ctx_void)
siglongjmp(jmpbuf, 1);
}
-static int test_vsys_r(void)
+static void test_vsys_r(void)
{
- printf("[RUN]\tChecking read access to the vsyscall page\n");
+ ksft_print_msg("Checking read access to the vsyscall page\n");
bool can_read;
if (sigsetjmp(jmpbuf, 1) == 0) {
*(volatile int *)0xffffffffff600000;
@@ -352,30 +347,25 @@ static int test_vsys_r(void)
can_read = false;
}
- if (can_read && !vsyscall_map_r) {
- printf("[FAIL]\tWe have read access, but we shouldn't\n");
- return 1;
- } else if (!can_read && vsyscall_map_r) {
- printf("[FAIL]\tWe don't have read access, but we should\n");
- return 1;
- } else if (can_read) {
- printf("[OK]\tWe have read access\n");
- } else {
- printf("[OK]\tWe do not have read access: #PF(0x%lx)\n",
- segv_err);
- }
-
- return 0;
+ if (can_read && !vsyscall_map_r)
+ ksft_test_result_fail("We have read access, but we shouldn't\n");
+ else if (!can_read && vsyscall_map_r)
+ ksft_test_result_fail("We don't have read access, but we should\n");
+ else if (can_read)
+ ksft_test_result_pass("We have read access\n");
+ else
+ ksft_test_result_pass("We do not have read access: #PF(0x%lx)\n", segv_err);
}
-static int test_vsys_x(void)
+static void test_vsys_x(void)
{
if (vsyscall_map_x) {
/* We already tested this adequately. */
- return 0;
+ ksft_test_result_pass("vsyscall_map_x is true\n");
+ return;
}
- printf("[RUN]\tMake sure that vsyscalls really page fault\n");
+ ksft_print_msg("Make sure that vsyscalls really page fault\n");
bool can_exec;
if (sigsetjmp(jmpbuf, 1) == 0) {
@@ -385,18 +375,14 @@ static int test_vsys_x(void)
can_exec = false;
}
- if (can_exec) {
- printf("[FAIL]\tExecuting the vsyscall did not page fault\n");
- return 1;
- } else if (segv_err & (1 << 4)) { /* INSTR */
- printf("[OK]\tExecuting the vsyscall page failed: #PF(0x%lx)\n",
- segv_err);
- } else {
- printf("[FAIL]\tExecution failed with the wrong error: #PF(0x%lx)\n",
- segv_err);
- return 1;
- }
- return 0;
+ if (can_exec)
+ ksft_test_result_fail("Executing the vsyscall did not page fault\n");
+ else if (segv_err & (1 << 4)) /* INSTR */
+ ksft_test_result_pass("Executing the vsyscall page failed: #PF(0x%lx)\n",
+ segv_err);
+ else
+ ksft_test_result_fail("Execution failed with the wrong error: #PF(0x%lx)\n",
+ segv_err);
}
/*
@@ -410,13 +396,13 @@ static int test_vsys_x(void)
* fact that ptrace() ever worked was a nice courtesy of old kernels,
* but the code to support it is fairly gross.
*/
-static int test_process_vm_readv(void)
+static void test_process_vm_readv(void)
{
char buf[4096];
struct iovec local, remote;
int ret;
- printf("[RUN]\tprocess_vm_readv() from vsyscall page\n");
+ ksft_print_msg("process_vm_readv() from vsyscall page\n");
local.iov_base = buf;
local.iov_len = 4096;
@@ -428,25 +414,18 @@ static int test_process_vm_readv(void)
* We expect process_vm_readv() to work if and only if the
* vsyscall page is readable.
*/
- printf("[%s]\tprocess_vm_readv() failed (ret = %d, errno = %d)\n", vsyscall_map_r ? "FAIL" : "OK", ret, errno);
- return vsyscall_map_r ? 1 : 0;
+ ksft_test_result(!vsyscall_map_r,
+ "process_vm_readv() failed (ret = %d, errno = %d)\n", ret, errno);
+ return;
}
- if (vsyscall_map_r) {
- if (!memcmp(buf, remote.iov_base, sizeof(buf))) {
- printf("[OK]\tIt worked and read correct data\n");
- } else {
- printf("[FAIL]\tIt worked but returned incorrect data\n");
- return 1;
- }
- } else {
- printf("[FAIL]\tprocess_rm_readv() succeeded, but it should have failed in this configuration\n");
- return 1;
- }
- return 0;
+ if (vsyscall_map_r)
+ ksft_test_result(!memcmp(buf, remote.iov_base, sizeof(buf)), "Read data\n");
+ else
+ ksft_test_result_fail("process_rm_readv() succeeded, but it should have failed in this configuration\n");
}
-static int init_vsys(void)
+static void init_vsys(void)
{
int nerrs = 0;
FILE *maps;
@@ -455,9 +434,9 @@ static int init_vsys(void)
maps = fopen("/proc/self/maps", "r");
if (!maps) {
- printf("[WARN]\tCould not open /proc/self/maps -- assuming vsyscall is r-x\n");
+ ksft_test_result_skip("Could not open /proc/self/maps -- assuming vsyscall is r-x\n");
vsyscall_map_r = true;
- return 0;
+ return;
}
while (fgets(line, MAPS_LINE_LEN, maps)) {
@@ -473,15 +452,15 @@ static int init_vsys(void)
if (strcmp(name, "[vsyscall]"))
continue;
- printf("\tvsyscall map: %s", line);
+ ksft_print_msg("vsyscall map: %s", line);
if (start != (void *)0xffffffffff600000 ||
end != (void *)0xffffffffff601000) {
- printf("[FAIL]\taddress range is nonsense\n");
+ ksft_print_msg("address range is nonsense\n");
nerrs++;
}
- printf("\tvsyscall permissions are %c-%c\n", r, x);
+ ksft_print_msg("vsyscall permissions are %c-%c\n", r, x);
vsyscall_map_r = (r == 'r');
vsyscall_map_x = (x == 'x');
@@ -492,12 +471,12 @@ static int init_vsys(void)
fclose(maps);
if (!found) {
- printf("\tno vsyscall map in /proc/self/maps\n");
+ ksft_print_msg("no vsyscall map in /proc/self/maps\n");
vsyscall_map_r = false;
vsyscall_map_x = false;
}
- return nerrs;
+ ksft_test_result(!nerrs, "vsyscall map\n");
}
static volatile sig_atomic_t num_vsyscall_traps;
@@ -511,15 +490,17 @@ static void sigtrap(int sig, siginfo_t *info, void *ctx_void)
num_vsyscall_traps++;
}
-static int test_emulation(void)
+static void test_emulation(void)
{
time_t tmp;
bool is_native;
- if (!vsyscall_map_x)
- return 0;
+ if (!vsyscall_map_x) {
+ ksft_test_result_skip("vsyscall_map_x isn't set\n");
+ return;
+ }
- printf("[RUN]\tchecking that vsyscalls are emulated\n");
+ ksft_print_msg("checking that vsyscalls are emulated\n");
sethandler(SIGTRAP, sigtrap, 0);
set_eflags(get_eflags() | X86_EFLAGS_TF);
vtime(&tmp);
@@ -535,36 +516,35 @@ static int test_emulation(void)
*/
is_native = (num_vsyscall_traps > 1);
- printf("[%s]\tvsyscalls are %s (%d instructions in vsyscall page)\n",
- (is_native ? "FAIL" : "OK"),
- (is_native ? "native" : "emulated"),
- (int)num_vsyscall_traps);
-
- return is_native;
+ ksft_test_result(!is_native, "vsyscalls are %s (%d instructions in vsyscall page)\n",
+ (is_native ? "native" : "emulated"), (int)num_vsyscall_traps);
}
#endif
int main(int argc, char **argv)
{
- int nerrs = 0;
+ int total_tests = TOTAL_TESTS;
+
+ ksft_print_header();
+ ksft_set_plan(total_tests);
init_vdso();
#ifdef __x86_64__
- nerrs += init_vsys();
+ init_vsys();
#endif
- nerrs += test_gtod();
- nerrs += test_time();
- nerrs += test_getcpu(0);
- nerrs += test_getcpu(1);
+ test_gtod();
+ test_time();
+ test_getcpu(0);
+ test_getcpu(1);
#ifdef __x86_64__
sethandler(SIGSEGV, sigsegv, 0);
- nerrs += test_vsys_r();
- nerrs += test_vsys_x();
- nerrs += test_process_vm_readv();
- nerrs += test_emulation();
+ test_vsys_r();
+ test_vsys_x();
+ test_process_vm_readv();
+ test_emulation();
#endif
- return nerrs ? 1 : 0;
+ ksft_finished();
}