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s390: wire up s390_guarded_storage syscall
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1 /*
2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5  * Copyright (c) 1996-2001 Wichert Akkerman <wichert@cistron.nl>
6  * Copyright (c) 1999-2017 The strace developers.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. The name of the author may not be used to endorse or promote products
18  *    derived from this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31
32 #include "defs.h"
33 #include <linux/ioctl.h>
34 #include "xlat/ioctl_dirs.h"
35
36 #ifdef HAVE_LINUX_INPUT_H
37 # include <linux/input.h>
38 #endif
39
40 #include "xlat/evdev_abs.h"
41 #include "xlat/evdev_ev.h"
42
43 static int
44 compare(const void *a, const void *b)
45 {
46         const unsigned int code1 = (const uintptr_t) a;
47         const unsigned int code2 = ((struct_ioctlent *) b)->code;
48         return (code1 > code2) ? 1 : (code1 < code2) ? -1 : 0;
49 }
50
51 static const struct_ioctlent *
52 ioctl_lookup(const unsigned int code)
53 {
54         struct_ioctlent *iop;
55
56         iop = bsearch((const void *) (const uintptr_t) code, ioctlent,
57                         nioctlents, sizeof(ioctlent[0]), compare);
58         while (iop > ioctlent) {
59                 iop--;
60                 if (iop->code != code) {
61                         iop++;
62                         break;
63                 }
64         }
65         return iop;
66 }
67
68 static const struct_ioctlent *
69 ioctl_next_match(const struct_ioctlent *iop)
70 {
71         const unsigned int code = iop->code;
72         iop++;
73         if (iop < ioctlent + nioctlents && iop->code == code)
74                 return iop;
75         return NULL;
76 }
77
78 static void
79 ioctl_print_code(const unsigned int code)
80 {
81         tprints("_IOC(");
82         printflags(ioctl_dirs, _IOC_DIR(code), "_IOC_???");
83         tprintf(", %#x, %#x, %#x)",
84                 _IOC_TYPE(code), _IOC_NR(code), _IOC_SIZE(code));
85 }
86
87 static int
88 evdev_decode_number(const unsigned int code)
89 {
90         const unsigned int nr = _IOC_NR(code);
91
92         if (_IOC_DIR(code) == _IOC_WRITE) {
93                 if (nr >= 0xc0 && nr <= 0xc0 + 0x3f) {
94                         tprints("EVIOCSABS(");
95                         printxval(evdev_abs, nr - 0xc0, "ABS_???");
96                         tprints(")");
97                         return 1;
98                 }
99         }
100
101         if (_IOC_DIR(code) != _IOC_READ)
102                 return 0;
103
104         if (nr >= 0x20 && nr <= 0x20 + 0x1f) {
105                 tprints("EVIOCGBIT(");
106                 printxval(evdev_ev, nr - 0x20, "EV_???");
107                 tprintf(", %u)", _IOC_SIZE(code));
108                 return 1;
109         } else if (nr >= 0x40 && nr <= 0x40 + 0x3f) {
110                 tprints("EVIOCGABS(");
111                 printxval(evdev_abs, nr - 0x40, "ABS_???");
112                 tprints(")");
113                 return 1;
114         }
115
116         switch (_IOC_NR(nr)) {
117                 case 0x06:
118                         tprintf("EVIOCGNAME(%u)", _IOC_SIZE(code));
119                         return 1;
120                 case 0x07:
121                         tprintf("EVIOCGPHYS(%u)", _IOC_SIZE(code));
122                         return 1;
123                 case 0x08:
124                         tprintf("EVIOCGUNIQ(%u)", _IOC_SIZE(code));
125                         return 1;
126                 case 0x09:
127                         tprintf("EVIOCGPROP(%u)", _IOC_SIZE(code));
128                         return 1;
129                 case 0x0a:
130                         tprintf("EVIOCGMTSLOTS(%u)", _IOC_SIZE(code));
131                         return 1;
132                 case 0x18:
133                         tprintf("EVIOCGKEY(%u)", _IOC_SIZE(code));
134                         return 1;
135                 case 0x19:
136                         tprintf("EVIOCGLED(%u)", _IOC_SIZE(code));
137                         return 1;
138                 case 0x1a:
139                         tprintf("EVIOCGSND(%u)", _IOC_SIZE(code));
140                         return 1;
141                 case 0x1b:
142                         tprintf("EVIOCGSW(%u)", _IOC_SIZE(code));
143                         return 1;
144                 default:
145                         return 0;
146         }
147 }
148
149 static int
150 hiddev_decode_number(const unsigned int code)
151 {
152         if (_IOC_DIR(code) == _IOC_READ) {
153                 switch (_IOC_NR(code)) {
154                         case 0x04:
155                                 tprintf("HIDIOCGRAWNAME(%u)", _IOC_SIZE(code));
156                                 return 1;
157                         case 0x05:
158                                 tprintf("HIDIOCGRAWPHYS(%u)", _IOC_SIZE(code));
159                                 return 1;
160                         case 0x06:
161                                 tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(code));
162                                 return 1;
163                         case 0x12:
164                                 tprintf("HIDIOCGPHYS(%u)", _IOC_SIZE(code));
165                                 return 1;
166                         default:
167                                 return 0;
168                 }
169         } else if (_IOC_DIR(code) == (_IOC_READ | _IOC_WRITE)) {
170                 switch (_IOC_NR(code)) {
171                         case 0x06:
172                                 tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(code));
173                                 return 1;
174                         case 0x07:
175                                 tprintf("HIDIOCGFEATURE(%u)", _IOC_SIZE(code));
176                                 return 1;
177                         default:
178                                 return 0;
179                 }
180         }
181
182         return 0;
183 }
184
185 static int
186 ioctl_decode_command_number(struct tcb *tcp)
187 {
188         const unsigned int code = tcp->u_arg[1];
189
190         switch (_IOC_TYPE(code)) {
191                 case 'E':
192                         return evdev_decode_number(code);
193                 case 'H':
194                         return hiddev_decode_number(code);
195                 case 'M':
196                         if (_IOC_DIR(code) == _IOC_WRITE) {
197                                 tprintf("MIXER_WRITE(%u)", _IOC_NR(code));
198                                 return 1;
199                         } else if (_IOC_DIR(code) == _IOC_READ) {
200                                 tprintf("MIXER_READ(%u)", _IOC_NR(code));
201                                 return 1;
202                         }
203                         return 0;
204                 case 'U':
205                         if (_IOC_DIR(code) == _IOC_READ && _IOC_NR(code) == 0x2c) {
206                                 tprintf("UI_GET_SYSNAME(%u)", _IOC_SIZE(code));
207                                 return 1;
208                         }
209                         return 0;
210                 case 'j':
211                         if (_IOC_DIR(code) == _IOC_READ && _IOC_NR(code) == 0x13) {
212                                 tprintf("JSIOCGNAME(%u)", _IOC_SIZE(code));
213                                 return 1;
214                         }
215                         return 0;
216                 case 'k':
217                         if (_IOC_DIR(code) == _IOC_WRITE && _IOC_NR(code) == 0) {
218                                 tprintf("SPI_IOC_MESSAGE(%u)", _IOC_SIZE(code));
219                                 return 1;
220                         }
221                         return 0;
222                 default:
223                         return 0;
224         }
225 }
226
227 static int
228 ioctl_decode(struct tcb *tcp)
229 {
230         const unsigned int code = tcp->u_arg[1];
231         const kernel_ulong_t arg = tcp->u_arg[2];
232
233         switch (_IOC_TYPE(code)) {
234 #if defined(ALPHA) || defined(POWERPC)
235         case 'f': {
236                 int ret = file_ioctl(tcp, code, arg);
237                 if (ret != RVAL_DECODED)
238                         return ret;
239         }
240         case 't':
241         case 'T':
242                 return term_ioctl(tcp, code, arg);
243 #else /* !ALPHA */
244         case 'f':
245                 return file_ioctl(tcp, code, arg);
246         case 0x54:
247 #endif /* !ALPHA */
248                 return term_ioctl(tcp, code, arg);
249         case 0x89:
250                 return sock_ioctl(tcp, code, arg);
251         case 'p':
252                 return rtc_ioctl(tcp, code, arg);
253         case 0x03:
254                 return hdio_ioctl(tcp, code, arg);
255         case 0x12:
256                 return block_ioctl(tcp, code, arg);
257         case 'X':
258                 return fs_x_ioctl(tcp, code, arg);
259         case 0x22:
260                 return scsi_ioctl(tcp, code, arg);
261         case 'L':
262                 return loop_ioctl(tcp, code, arg);
263         case 'M':
264                 return mtd_ioctl(tcp, code, arg);
265         case 'o':
266         case 'O':
267                 return ubi_ioctl(tcp, code, arg);
268         case 'V':
269                 return v4l2_ioctl(tcp, code, arg);
270         case '=':
271                 return ptp_ioctl(tcp, code, arg);
272 #ifdef HAVE_LINUX_INPUT_H
273         case 'E':
274                 return evdev_ioctl(tcp, code, arg);
275 #endif
276 #ifdef HAVE_LINUX_USERFAULTFD_H
277         case 0xaa:
278                 return uffdio_ioctl(tcp, code, arg);
279 #endif
280 #ifdef HAVE_LINUX_BTRFS_H
281         case 0x94:
282                 return btrfs_ioctl(tcp, code, arg);
283 #endif
284         case 0xb7:
285                 return nsfs_ioctl(tcp, code, arg);
286 #ifdef HAVE_LINUX_DM_IOCTL_H
287         case 0xfd:
288                 return dm_ioctl(tcp, code, arg);
289 #endif
290         default:
291                 break;
292         }
293         return 0;
294 }
295
296 SYS_FUNC(ioctl)
297 {
298         const struct_ioctlent *iop;
299         int ret;
300
301         if (entering(tcp)) {
302                 printfd(tcp, tcp->u_arg[0]);
303                 tprints(", ");
304                 ret = ioctl_decode_command_number(tcp);
305                 if (!(ret & IOCTL_NUMBER_STOP_LOOKUP)) {
306                         iop = ioctl_lookup(tcp->u_arg[1]);
307                         if (iop) {
308                                 if (ret)
309                                         tprints(" or ");
310                                 tprints(iop->symbol);
311                                 while ((iop = ioctl_next_match(iop)))
312                                         tprintf(" or %s", iop->symbol);
313                         } else if (!ret) {
314                                 ioctl_print_code(tcp->u_arg[1]);
315                         }
316                 }
317                 ret = ioctl_decode(tcp);
318         } else {
319                 ret = ioctl_decode(tcp) | RVAL_DECODED;
320         }
321
322         if (ret & RVAL_DECODED) {
323                 ret &= ~RVAL_DECODED;
324                 if (ret)
325                         --ret;
326                 else
327                         tprintf(", %#" PRI_klx, tcp->u_arg[2]);
328                 ret |= RVAL_DECODED;
329         } else {
330                 if (ret)
331                         --ret;
332         }
333
334         return ret;
335 }