1 /******************************************************************************/
2 /* */
3 /* Copyright (c) International Business Machines Corp., 2008 */
4 /* Copyright 2008 Paul Mackerras, IBM Corp. */
5 /* */
6 /* This program is free software; you can redistribute it and/or modify */
7 /* it under the terms of the GNU General Public License as published by */
8 /* the Free Software Foundation; either version 2 of the License, or */
9 /* (at your option) any later version. */
10 /* */
11 /* This program is distributed in the hope that it will be useful, */
12 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
13 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
14 /* the GNU General Public License for more details. */
15 /* */
16 /* You should have received a copy of the GNU General Public License */
17 /* along with this program; if not, write to the Free Software */
18 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
19 /* */
20 /******************************************************************************/
21 /******************************************************************************/
22 /* */
23 /* File: endian_switch01.c */
24 /* */
25 /* Description: Test little-endian mode switch system call. Requires a 64-bit */
26 /* processor that supports little-endian mode,such as POWER6. */
27 /* */
28 /* Total Tests: 1 */
29 /* */
30 /* Test Name: endian_switch01 */
31 /* */
32 /* Author: Paul Mackerras <paulus@samba.org> */
33 /* */
34 /* History: Created - Sep 02 2008 - Paul Mackerras <paulus@samba.org> */
35 /* Ported to LTP */
36 /* - Sep 02 2008 */
37 /* - Subrata Modak <subrata@linux.vnet.ibm.com> */
38 /* */
39 /******************************************************************************/
40
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <elf.h>
44 #include <signal.h>
45 #include <setjmp.h>
46 #include "test.h"
47 #include <errno.h>
48 #include <sys/stat.h>
49 #include <sys/types.h>
50 #include <sys/syscall.h>
51 #include <fcntl.h>
52 #include <sys/utsname.h>
53 #include <unistd.h>
54 #include "linux_syscall_numbers.h"
55
56 #if defined (__powerpc64__) || (__powerpc__)
57 static void setup();
58 #endif
59
60 static void cleanup();
61
62 char *TCID = "endian_switch01";
63 int TST_TOTAL = 1;
64
65 #if defined (__powerpc64__) || (__powerpc__)
setup(void)66 void setup(void)
67 {
68
69 tst_sig(FORK, DEF_HANDLER, cleanup);
70
71 TEST_PAUSE;
72
73 }
74
75 extern int main4(int ac, char **av, char **envp, unsigned long *auxv)
76 __asm("main");
77 #endif
78
cleanup(void)79 void cleanup(void)
80 {
81
82 }
83
84 #if defined (__powerpc64__) || (__powerpc__)
85 #ifndef PPC_FEATURE_TRUE_LE
86 #define PPC_FEATURE_TRUE_LE 0x00000002
87 #endif
88
89 #include <asm/cputable.h>
90
91 volatile int got_sigill;
92 sigjmp_buf jb;
93
sigill(int sig)94 void sigill(int sig)
95 {
96 got_sigill = 1;
97 siglongjmp(jb, 1);
98 }
99
do_le_switch(void)100 void do_le_switch(void)
101 {
102 register int r0 asm("r0");
103
104 r0 = 0x1ebe;
105 asm volatile ("sc; .long 0x02000044":"=&r" (r0):"0"(r0)
106 :"cr0", "r9", "r10", "r11", "r12");
107 }
108
main4(int ac,char ** av,char ** envp,unsigned long * auxv)109 int main4(int ac, char **av, char **envp, unsigned long *auxv)
110 {
111
112 if ((tst_kvercmp(2, 6, 26)) < 0) {
113 tst_brkm(TCONF,
114 NULL,
115 "This test can only run on kernels that are 2.6.26 and higher");
116 }
117 setup();
118 for (; *auxv != AT_NULL && *auxv != AT_HWCAP; auxv += 2) ;
119 if (!(auxv[0] == AT_HWCAP && (auxv[1] & PPC_FEATURE_TRUE_LE))) {
120 tst_brkm(TCONF, cleanup,
121 "Processor does not support little-endian mode");
122 }
123 signal(SIGILL, sigill);
124 if (sigsetjmp(jb, 1) == 0)
125 do_le_switch();
126 if (got_sigill) {
127 tst_brkm(TFAIL, NULL, "Got SIGILL - test failed");
128 }
129 tst_resm(TPASS, "endian_switch() syscall tests passed");
130 tst_exit();
131 }
132
133 #else
134
main(void)135 int main(void)
136 {
137
138 tst_brkm(TCONF, cleanup,
139 "This system does not support running of switch() syscall");
140 }
141
142 #endif
143