[LTP] [PATCH] endian_switch01: rewrite to newlib
Jan Stancek
jstancek@redhat.com
Wed Jan 10 13:42:04 CET 2018
Also check that syscall is supported (doesn't return ENOSYS),
before running actual test. This is to address kernels where
this syscall is disabled by default:
commit 727f13616c45 ("powerpc: Disable the fast-endian switch syscall by default")
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
testcases/kernel/syscalls/switch/endian_switch01.c | 267 ++++++++++-----------
1 file changed, 125 insertions(+), 142 deletions(-)
rewrite testcases/kernel/syscalls/switch/endian_switch01.c (96%)
diff --git a/testcases/kernel/syscalls/switch/endian_switch01.c b/testcases/kernel/syscalls/switch/endian_switch01.c
dissimilarity index 96%
index 86aed891009e..3e5ff47fc2a9 100644
--- a/testcases/kernel/syscalls/switch/endian_switch01.c
+++ b/testcases/kernel/syscalls/switch/endian_switch01.c
@@ -1,142 +1,125 @@
-/******************************************************************************/
-/* */
-/* Copyright (c) International Business Machines Corp., 2008 */
-/* Copyright 2008 Paul Mackerras, IBM Corp. */
-/* */
-/* This program is free software; you can redistribute it and/or modify */
-/* it under the terms of the GNU General Public License as published by */
-/* the Free Software Foundation; either version 2 of the License, or */
-/* (at your option) any later version. */
-/* */
-/* This program is distributed in the hope that it will be useful, */
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
-/* the GNU General Public License for more details. */
-/* */
-/* You should have received a copy of the GNU General Public License */
-/* along with this program; if not, write to the Free Software */
-/* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
-/* */
-/******************************************************************************/
-/******************************************************************************/
-/* */
-/* File: endian_switch01.c */
-/* */
-/* Description: Test little-endian mode switch system call. Requires a 64-bit */
-/* processor that supports little-endian mode,such as POWER6. */
-/* */
-/* Total Tests: 1 */
-/* */
-/* Test Name: endian_switch01 */
-/* */
-/* Author: Paul Mackerras <paulus@samba.org> */
-/* */
-/* History: Created - Sep 02 2008 - Paul Mackerras <paulus@samba.org> */
-/* Ported to LTP */
-/* - Sep 02 2008 */
-/* - Subrata Modak <subrata@linux.vnet.ibm.com> */
-/* */
-/******************************************************************************/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <elf.h>
-#include <signal.h>
-#include <setjmp.h>
-#include "test.h"
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/syscall.h>
-#include <fcntl.h>
-#include <sys/utsname.h>
-#include <unistd.h>
-#include "lapi/syscalls.h"
-
-#if defined (__powerpc64__) || (__powerpc__)
-static void setup();
-#endif
-
-static void cleanup();
-
-char *TCID = "endian_switch01";
-int TST_TOTAL = 1;
-
-#if defined (__powerpc64__) || (__powerpc__)
-void setup(void)
-{
-
- tst_sig(FORK, DEF_HANDLER, cleanup);
-
- TEST_PAUSE;
-
-}
-
-extern int main4(int ac, char **av, char **envp, unsigned long *auxv)
-__asm("main");
-#endif
-
-void cleanup(void)
-{
-
-}
-
-#if defined (__powerpc64__) || (__powerpc__)
-#ifndef PPC_FEATURE_TRUE_LE
-#define PPC_FEATURE_TRUE_LE 0x00000002
-#endif
-
-#include <asm/cputable.h>
-
-volatile int got_sigill;
-sigjmp_buf jb;
-
-void sigill(int sig)
-{
- got_sigill = 1;
- siglongjmp(jb, 1);
-}
-
-void do_le_switch(void)
-{
- register int r0 asm("r0");
-
- r0 = 0x1ebe;
- asm volatile ("sc; .long 0x02000044":"=&r" (r0):"0"(r0)
- :"cr0", "r9", "r10", "r11", "r12");
-}
-
-int main4(int ac, char **av, char **envp, unsigned long *auxv)
-{
-
- if ((tst_kvercmp(2, 6, 26)) < 0) {
- tst_brkm(TCONF,
- NULL,
- "This test can only run on kernels that are 2.6.26 and higher");
- }
- setup();
- for (; *auxv != AT_NULL && *auxv != AT_HWCAP; auxv += 2) ;
- if (!(auxv[0] == AT_HWCAP && (auxv[1] & PPC_FEATURE_TRUE_LE))) {
- tst_brkm(TCONF, cleanup,
- "Processor does not support little-endian mode");
- }
- signal(SIGILL, sigill);
- if (sigsetjmp(jb, 1) == 0)
- do_le_switch();
- if (got_sigill) {
- tst_brkm(TFAIL, NULL, "Got SIGILL - test failed");
- }
- tst_resm(TPASS, "endian_switch() syscall tests passed");
- tst_exit();
-}
-
-#else
-
-int main(void)
-{
-
- tst_brkm(TCONF, cleanup,
- "This system does not support running of switch() syscall");
-}
-
-#endif
+/*
+ * Copyright (c) International Business Machines Corp., 2008
+ * Copyright (c) Paul Mackerras, IBM Corp., 2008
+ * Copyright (c) 2018 Linux Test Project
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Test little-endian mode switch system call. Requires a 64-bit
+ * processor that supports little-endian mode,such as POWER6.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <elf.h>
+#include "tst_test.h"
+
+#if defined (__powerpc64__) || (__powerpc__)
+# ifndef PPC_FEATURE_TRUE_LE
+# define PPC_FEATURE_TRUE_LE 0x00000002
+# endif
+
+# define TST_NO_DEFAULT_MAIN
+
+/*
+ * Make minimal call to 0x1ebe. If we get ENOSYS then syscall is not
+ * available, likely because of:
+ * commit 727f13616c45 ("powerpc: Disable the fast-endian switch syscall by default")
+ * If we get any other outcome, including crashes with various signals,
+ * then we assume syscall is available and carry on with the test.
+ */
+void check_le_switch_supported(void)
+{
+ int status;
+
+ if (SAFE_FORK() == 0) {
+ syscall(0x1ebe);
+ exit(errno);
+ }
+
+ SAFE_WAIT(&status);
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+
+ tst_res(TINFO, "check exited with sig %d", sig);
+ } else if (WIFEXITED(status)) {
+ int rc = WEXITSTATUS(status);
+
+ tst_res(TINFO, "check exited with %d", rc);
+ if (rc == ENOSYS)
+ tst_brk(TCONF, "fast endian switch (0x1ebe) N/A");
+ }
+}
+
+void test_le_switch(void)
+{
+ int status;
+
+ if (SAFE_FORK() == 0) {
+ register int r0 asm("r0") = 0x1ebe;
+
+ asm volatile ("sc; .long 0x02000044"
+ : "=&r" (r0)
+ : "0"(r0)
+ : "cr0", "r9", "r10", "r11", "r12");
+ exit(0);
+ }
+
+ SAFE_WAIT(&status);
+ if (WIFSIGNALED(status)) {
+ int sig = WTERMSIG(status);
+
+ tst_res(TFAIL, "test exited with sig %d", sig);
+ } else if (WIFEXITED(status)) {
+ int rc = WEXITSTATUS(status);
+
+ if (rc != 0)
+ tst_res(TFAIL, "test exited with %d", rc);
+ else
+ tst_res(TPASS, "endian_switch() syscall tests passed");
+ }
+}
+
+static void endian_test(void)
+{
+ check_le_switch_supported();
+ test_le_switch();
+}
+
+static struct tst_test test = {
+ .test_all = endian_test,
+ .min_kver = "2.6.26",
+ .forks_child = 1,
+};
+
+int main4(int argc, char **argv, LTP_ATTRIBUTE_UNUSED char **envp,
+ unsigned long *auxv)
+{
+ for (; *auxv != AT_NULL && *auxv != AT_HWCAP; auxv += 2)
+ ;
+
+ if (!(auxv[0] == AT_HWCAP && (auxv[1] & PPC_FEATURE_TRUE_LE)))
+ tst_brk(TCONF, "Processor does not support little-endian mode");
+
+ tst_run_tcases(argc, argv, &test);
+ return 0;
+}
+
+#else /* defined (__powerpc64__) || (__powerpc__) */
+TST_TEST_TCONF("This system does not support running of switch() syscall");
+#endif
--
1.8.3.1
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