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Introduce generic STRINGIFY and STRINGIFY_VAL macros
[strace] / tests / kexec_file_load.c
1 /*
2  * Check decoding of kexec_file_load syscall.
3  *
4  * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
5  * Copyright (c) 2016-2017 The strace developers.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 #include "tests.h"
32 #include <asm/unistd.h>
33 #include "scno.h"
34
35 #ifdef __NR_kexec_file_load
36
37 # include <inttypes.h>
38 # include <stdio.h>
39 # include <unistd.h>
40
41 struct strval {
42         kernel_ulong_t val;
43         const char *str64;
44         const char *str32;
45         const char *str;
46 };
47
48 #define CMDLINE_STR "deadcodebaddatadefaced"
49
50 int
51 main(void)
52 {
53         static const kernel_ulong_t bogus_kernel_fd =
54                 (kernel_ulong_t) 0xdeadca57badda7a1ULL;
55         static const kernel_ulong_t bogus_initrd_fd =
56                 (kernel_ulong_t) 0xdec0ded1defaced2ULL;
57         static const char cmdline_str[] = CMDLINE_STR;
58         static const char cmdline_short_str[] = "abcdef";
59
60         static const kernel_ulong_t cmdline_lens[] = {
61                 0,
62                 (kernel_ulong_t) 0xcaffeeeddeadbeefULL,
63                 sizeof(cmdline_str),
64                 sizeof(cmdline_str) - 1,
65                 sizeof(cmdline_short_str),
66                 sizeof(cmdline_short_str) - 1,
67                 sizeof(cmdline_short_str) + 1,
68         };
69         static const struct strval flags[] = {
70                 { (kernel_ulong_t) 0xbadc0dedda7a1058ULL,
71                         "0xbadc0ded", "0x",
72                         "da7a1058 /* KEXEC_FILE_??? */" },
73                 { 0, "", "", "0" },
74                 { 0xdeadbeef, "", "", "KEXEC_FILE_UNLOAD|KEXEC_FILE_ON_CRASH|"
75                         "KEXEC_FILE_NO_INITRAMFS|0xdeadbee8" },
76         };
77
78
79         long rc;
80         char *cmdline = tail_memdup(cmdline_str, sizeof(cmdline_str));
81         char *cmdline_short =
82                 tail_memdup(cmdline_short_str, sizeof(cmdline_short_str));
83         char cmdline_ptr[sizeof("0x") + sizeof(void *) * 2];
84         char cmdline_short_ptr[sizeof("0x") + sizeof(void *) * 2];
85         unsigned int i;
86         unsigned int j;
87
88         struct strval cmdlines[] = {
89                 { (uintptr_t) NULL, "", "", "NULL" },
90                 { (uintptr_t) (cmdline + sizeof(cmdline_str)), "", "",
91                         cmdline_ptr },
92                 { (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
93                 { (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
94                 { (uintptr_t) cmdline_short, "", "", "\"abcdef\\0\"" },
95                 { (uintptr_t) cmdline_short, "", "", "\"abcdef\"" },
96                 { (uintptr_t) cmdline_short, "", "", cmdline_short_ptr },
97         };
98
99
100         snprintf(cmdline_ptr, sizeof(cmdline_ptr), "%p",
101                 cmdline + sizeof(cmdline_str));
102         snprintf(cmdline_short_ptr, sizeof(cmdline_short_ptr), "%p",
103                 cmdline_short);
104
105         for (i = 0; i < ARRAY_SIZE(flags); i++) {
106                 for (j = 0; j < ARRAY_SIZE(cmdlines); j++) {
107                         rc = syscall(__NR_kexec_file_load, bogus_kernel_fd,
108                                      bogus_initrd_fd, cmdline_lens[j],
109                                      cmdlines[j].val, flags[i].val);
110                         printf("kexec_file_load(%d, %d, %llu, %s, %s%s) = %s\n",
111                                (int) bogus_kernel_fd, (int) bogus_initrd_fd,
112                                (unsigned long long) cmdline_lens[j],
113                                cmdlines[j].str,
114                                sizeof(kernel_ulong_t) == 8 ? flags[i].str64 :
115                                flags[i].str32, flags[i].str, sprintrc(rc));
116                 }
117         }
118
119         puts("+++ exited with 0 +++");
120
121         return 0;
122 }
123
124 #else
125
126 SKIP_MAIN_UNDEFINED("__NR_kexec_file_load");
127
128 #endif