[PATCH 1/2] selftests: x86: test_vsyscall: conform test to TAP format output

[Muhammad Usama Anjum]

Conform the layout, informational and status messages to TAP. No
functional change is intended other than the layout of output messages.
Without using TAP messages, the passed/failed/skip test names cannot be
found.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
---
 tools/testing/selftests/x86/test_vsyscall.c | 506 +++++++++-----------
 1 file changed, 238 insertions(+), 268 deletions(-)

diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index 47cab972807c4..d4c8e8d79d389 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -21,6 +21,13 @@
 #include <sys/uio.h>
 
 #include "helpers.h"
+#include "../kselftest.h"
+
+#ifdef __x86_64__
+#define TOTAL_TESTS 13
+#else
+#define TOTAL_TESTS 8
+#endif
 
 #ifdef __x86_64__
 # define VSYS(x) (x)
@@ -39,18 +46,6 @@
 /* max length of lines in /proc/self/maps - anything longer is skipped here */
 #define MAPS_LINE_LEN 128
 
-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");
-}
-
 /* vsyscalls and vDSO */
 bool vsyscall_map_r = false, vsyscall_map_x = false;
 
@@ -75,83 +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");
-}
-
-static int init_vsys(void)
-{
-#ifdef __x86_64__
-	int nerrs = 0;
-	FILE *maps;
-	char line[MAPS_LINE_LEN];
-	bool found = false;
-
-	maps = fopen("/proc/self/maps", "r");
-	if (!maps) {
-		printf("[WARN]\tCould not open /proc/self/maps -- assuming vsyscall is r-x\n");
-		vsyscall_map_r = true;
-		return 0;
-	}
-
-	while (fgets(line, MAPS_LINE_LEN, maps)) {
-		char r, x;
-		void *start, *end;
-		char name[MAPS_LINE_LEN];
-
-		/* sscanf() is safe here as strlen(name) >= strlen(line) */
-		if (sscanf(line, "%p-%p %c-%cp %*x %*x:%*x %*u %s",
-			   &start, &end, &r, &x, name) != 5)
-			continue;
-
-		if (strcmp(name, "[vsyscall]"))
-			continue;
-
-		printf("\tvsyscall map: %s", line);
-
-		if (start != (void *)0xffffffffff600000 ||
-		    end != (void *)0xffffffffff601000) {
-			printf("[FAIL]\taddress range is nonsense\n");
-			nerrs++;
-		}
-
-		printf("\tvsyscall permissions are %c-%c\n", r, x);
-		vsyscall_map_r = (r == 'r');
-		vsyscall_map_x = (x == 'x');
-
-		found = true;
-		break;
-	}
-
-	fclose(maps);
-
-	if (!found) {
-		printf("\tno vsyscall map in /proc/self/maps\n");
-		vsyscall_map_r = false;
-		vsyscall_map_x = false;
-	}
-
-	return nerrs;
-#else
-	return 0;
-#endif
+		ksft_print_msg("[WARN] failed to find getcpu in vDSO\n");
 }
 
 /* syscalls */
@@ -176,98 +113,76 @@ static inline long sys_getcpu(unsigned * cpu, unsigned * node,
 	return syscall(SYS_getcpu, cpu, node, cache);
 }
 
-static jmp_buf jmpbuf;
-static volatile unsigned long segv_err;
-
-static void sigsegv(int sig, siginfo_t *info, void *ctx_void)
-{
-	ucontext_t *ctx = (ucontext_t *)ctx_void;
-
-	segv_err =  ctx->uc_mcontext.gregs[REG_ERR];
-	siglongjmp(jmpbuf, 1);
-}
-
 static double tv_diff(const struct timeval *a, const struct timeval *b)
 {
 	return (double)(a->tv_sec - b->tv_sec) +
 		(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);
@@ -275,56 +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);
@@ -332,10 +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;
@@ -343,63 +261,84 @@ 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");
 	}
+}
+
+#ifdef __x86_64__
+
+static jmp_buf jmpbuf;
+static volatile unsigned long segv_err;
+
+static void sethandler(int sig, void (*handler)(int, siginfo_t *, void *),
+		       int flags)
+{
+	struct sigaction sa;
 
-	return nerrs;
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_sigaction = handler;
+	sa.sa_flags = SA_SIGINFO | flags;
+	sigemptyset(&sa.sa_mask);
+	if (sigaction(sig, &sa, 0))
+		ksft_exit_fail_msg("sigaction failed\n");
 }
 
-static int test_vsys_r(void)
+static void sigsegv(int sig, siginfo_t *info, void *ctx_void)
 {
-#ifdef __x86_64__
-	printf("[RUN]\tChecking read access to the vsyscall page\n");
+	ucontext_t *ctx = (ucontext_t *)ctx_void;
+
+	segv_err =  ctx->uc_mcontext.gregs[REG_ERR];
+	siglongjmp(jmpbuf, 1);
+}
+
+static void test_vsys_r(void)
+{
+	ksft_print_msg("Checking read access to the vsyscall page\n");
 	bool can_read;
 	if (sigsetjmp(jmpbuf, 1) == 0) {
 		*(volatile int *)0xffffffffff600000;
@@ -408,32 +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);
-	}
-#endif
-
-	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)
 {
-#ifdef __x86_64__
 	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) {
@@ -443,20 +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;
-	}
-#endif
-
-	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);
 }
 
 /*
@@ -470,14 +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)
 {
-#ifdef __x86_64__
 	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;
@@ -489,27 +414,71 @@ 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;
+	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 void init_vsys(void)
+{
+	int nerrs = 0;
+	FILE *maps;
+	char line[MAPS_LINE_LEN];
+	bool found = false;
+
+	maps = fopen("/proc/self/maps", "r");
+	if (!maps) {
+		ksft_test_result_skip("Could not open /proc/self/maps -- assuming vsyscall is r-x\n");
+		vsyscall_map_r = true;
+		return;
+	}
+
+	while (fgets(line, MAPS_LINE_LEN, maps)) {
+		char r, x;
+		void *start, *end;
+		char name[MAPS_LINE_LEN];
+
+		/* sscanf() is safe here as strlen(name) >= strlen(line) */
+		if (sscanf(line, "%p-%p %c-%cp %*x %*x:%*x %*u %s",
+			   &start, &end, &r, &x, name) != 5)
+			continue;
+
+		if (strcmp(name, "[vsyscall]"))
+			continue;
+
+		ksft_print_msg("vsyscall map: %s", line);
+
+		if (start != (void *)0xffffffffff600000 ||
+		    end != (void *)0xffffffffff601000) {
+			ksft_print_msg("address range is nonsense\n");
+			nerrs++;
 		}
-	} else {
-		printf("[FAIL]\tprocess_rm_readv() succeeded, but it should have failed in this configuration\n");
-		return 1;
+
+		ksft_print_msg("vsyscall permissions are %c-%c\n", r, x);
+		vsyscall_map_r = (r == 'r');
+		vsyscall_map_x = (x == 'x');
+
+		found = true;
+		break;
 	}
-#endif
 
-	return 0;
+	fclose(maps);
+
+	if (!found) {
+		ksft_print_msg("no vsyscall map in /proc/self/maps\n");
+		vsyscall_map_r = false;
+		vsyscall_map_x = false;
+	}
+
+	ksft_test_result(!nerrs, "vsyscall map\n");
 }
 
-#ifdef __x86_64__
 static volatile sig_atomic_t num_vsyscall_traps;
 
 static void sigtrap(int sig, siginfo_t *info, void *ctx_void)
@@ -521,15 +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);
@@ -545,36 +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;
 
-	init_vdso();
-	nerrs += init_vsys();
+	ksft_print_header();
+	ksft_set_plan(total_tests);
 
-	nerrs += test_gtod();
-	nerrs += test_time();
-	nerrs += test_getcpu(0);
-	nerrs += test_getcpu(1);
-
-	sethandler(SIGSEGV, sigsegv, 0);
-	nerrs += test_vsys_r();
-	nerrs += test_vsys_x();
+	init_vdso();
+#ifdef __x86_64__
+	init_vsys();
+#endif
 
-	nerrs += test_process_vm_readv();
+	test_gtod();
+	test_time();
+	test_getcpu(0);
+	test_getcpu(1);
 
 #ifdef __x86_64__
-	nerrs += test_emulation();
+	sethandler(SIGSEGV, sigsegv, 0);
+	test_vsys_r();
+	test_vsys_x();
+	test_process_vm_readv();
+	test_emulation();
 #endif
 
-	return nerrs ? 1 : 0;
+	ksft_finished();
 }
-- 
2.39.2