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Wichert Akkerman76baf7c1999-02-19 00:21:36 +00001/*
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>
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +00005 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
Roland McGrathe1e584b2003-06-02 19:18:58 +00006 * Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
7 * port by Greg Banks <gbanks@pocketpenguins.com>
Elliott Hughesb7556142018-02-20 17:03:16 -08008 * Copyright (c) 1999-2018 The strace developers.
Wichert Akkerman76baf7c1999-02-19 00:21:36 +00009 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000032 */
33
34#include "defs.h"
Elliott Hughesb7556142018-02-20 17:03:16 -080035#include <linux/mman.h>
Wichert Akkerman2e2553a1999-05-09 00:29:58 +000036#include <sys/mman.h>
Denys Vlasenko1ba85432013-02-19 11:28:20 +010037
Dmitry V. Levinea1fea62015-03-31 19:45:08 +000038unsigned long
39get_pagesize(void)
Dmitry V. Levinc76a3632013-03-05 14:58:24 +000040{
41 static unsigned long pagesize;
42
43 if (!pagesize)
44 pagesize = sysconf(_SC_PAGESIZE);
45 return pagesize;
46}
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000047
Dmitry V. Levina0bd3742015-04-07 01:36:50 +000048SYS_FUNC(brk)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000049{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +000050 printaddr(tcp->u_arg[0]);
51
52 return RVAL_DECODED | RVAL_HEX;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000053}
54
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +000055#include "xlat/mmap_prot.h"
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +000056#include "xlat/mmap_flags.h"
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000057
Elliott Hughesb7556142018-02-20 17:03:16 -080058#ifndef MAP_HUGE_SHIFT
59# define MAP_HUGE_SHIFT 26
60#endif
61
62#ifndef MAP_HUGE_MASK
63# define MAP_HUGE_MASK 0x3f
64#endif
65
66static void
67print_mmap_flags(kernel_ulong_t flags)
68{
69 printxval64(mmap_flags, flags & MAP_TYPE, "MAP_???");
70 flags &= ~MAP_TYPE;
71
72 const unsigned int mask = MAP_HUGE_MASK << MAP_HUGE_SHIFT;
73 const unsigned int hugetlb_value = flags & mask;
74
75 flags &= ~mask;
76 addflags(mmap_flags, flags);
77
78 if (hugetlb_value)
79 tprintf("|%u<<MAP_HUGE_SHIFT",
80 hugetlb_value >> MAP_HUGE_SHIFT);
81}
82
Dmitry V. Levin85813ce2015-07-19 23:37:40 +000083static void
Elliott Hughesd35df492017-02-15 15:19:05 -080084print_mmap(struct tcb *tcp, kernel_ulong_t *u_arg, unsigned long long offset)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000085{
Elliott Hughesd35df492017-02-15 15:19:05 -080086 const kernel_ulong_t addr = u_arg[0];
87 const kernel_ulong_t len = u_arg[1];
88 const kernel_ulong_t prot = u_arg[2];
89 const kernel_ulong_t flags = u_arg[3];
Dmitry V. Levin3ae86902016-04-01 15:31:23 +000090 const int fd = u_arg[4];
91
92 printaddr(addr);
Elliott Hughesd35df492017-02-15 15:19:05 -080093 tprintf(", %" PRI_klu ", ", len);
94 printflags64(mmap_prot, prot, "PROT_???");
Dmitry V. Levin85813ce2015-07-19 23:37:40 +000095 tprints(", ");
Elliott Hughesb7556142018-02-20 17:03:16 -080096 print_mmap_flags(flags);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +000097 tprints(", ");
Dmitry V. Levin3ae86902016-04-01 15:31:23 +000098 printfd(tcp, fd);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +000099 tprintf(", %#llx", offset);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000100}
101
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100102/* Syscall name<->function correspondence is messed up on many arches.
103 * For example:
104 * i386 has __NR_mmap == 90, and it is "old mmap", and
105 * also it has __NR_mmap2 == 192, which is a "new mmap with page offsets".
106 * But x86_64 has just one __NR_mmap == 9, a "new mmap with byte offsets".
107 * Confused? Me too!
108 */
109
Elliott Hughesb7556142018-02-20 17:03:16 -0800110#if HAVE_ARCH_OLD_MMAP
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100111/* Params are pointed to by u_arg[0], offset is in bytes */
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000112SYS_FUNC(old_mmap)
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +0000113{
Elliott Hughesb7556142018-02-20 17:03:16 -0800114 kernel_ulong_t *args =
115 fetch_indirect_syscall_args(tcp, tcp->u_arg[0], 6);
116
117 if (args)
118 print_mmap(tcp, args, args[5]);
119 else
120 printaddr(tcp->u_arg[0]);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000121
122 return RVAL_DECODED | RVAL_HEX;
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +0000123}
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +0000124
Elliott Hughesb7556142018-02-20 17:03:16 -0800125# if HAVE_ARCH_OLD_MMAP_PGOFF
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100126/* Params are pointed to by u_arg[0], offset is in pages */
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000127SYS_FUNC(old_mmap_pgoff)
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100128{
Elliott Hughesb7556142018-02-20 17:03:16 -0800129 kernel_ulong_t *args =
130 fetch_indirect_syscall_args(tcp, tcp->u_arg[0], 6);
131
132 if (args) {
133 unsigned long long offset;
134
135 offset = args[5];
136 offset *= get_pagesize();
137
138 print_mmap(tcp, args, offset);
139 } else {
140 printaddr(tcp->u_arg[0]);
141 }
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000142
143 return RVAL_DECODED | RVAL_HEX;
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100144}
Elliott Hughesb7556142018-02-20 17:03:16 -0800145# endif /* HAVE_ARCH_OLD_MMAP_PGOFF */
146#endif /* HAVE_ARCH_OLD_MMAP */
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100147
148/* Params are passed directly, offset is in bytes */
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000149SYS_FUNC(mmap)
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +0000150{
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100151 /* Example of kernel-side handling of this variety of mmap:
152 * arch/x86/kernel/sys_x86_64.c::SYSCALL_DEFINE6(mmap, ...) calls
153 * sys_mmap_pgoff(..., off >> PAGE_SHIFT); i.e. off is in bytes,
154 * since the above code converts off to pages.
155 */
Elliott Hughesd35df492017-02-15 15:19:05 -0800156 print_mmap(tcp, tcp->u_arg, tcp->u_arg[5]);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000157
158 return RVAL_DECODED | RVAL_HEX;
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100159}
160
161/* Params are passed directly, offset is in pages */
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000162SYS_FUNC(mmap_pgoff)
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100163{
164 /* Try test/mmap_offset_decode.c */
165 unsigned long long offset;
Elliott Hughesd35df492017-02-15 15:19:05 -0800166 offset = tcp->u_arg[5];
Dmitry V. Levinc76a3632013-03-05 14:58:24 +0000167 offset *= get_pagesize();
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000168 print_mmap(tcp, tcp->u_arg, offset);
169
170 return RVAL_DECODED | RVAL_HEX;
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100171}
172
173/* Params are passed directly, offset is in 4k units */
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000174SYS_FUNC(mmap_4koff)
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100175{
176 unsigned long long offset;
Elliott Hughesd35df492017-02-15 15:19:05 -0800177 offset = tcp->u_arg[5];
Denys Vlasenko1ba85432013-02-19 11:28:20 +0100178 offset <<= 12;
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000179 print_mmap(tcp, tcp->u_arg, offset);
180
181 return RVAL_DECODED | RVAL_HEX;
Wichert Akkerman4dc8a2a1999-12-23 14:20:14 +0000182}
183
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000184SYS_FUNC(munmap)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000185{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000186 printaddr(tcp->u_arg[0]);
Elliott Hughesd35df492017-02-15 15:19:05 -0800187 tprintf(", %" PRI_klu, tcp->u_arg[1]);
188
189 return RVAL_DECODED;
190}
191
192static int
193do_mprotect(struct tcb *tcp, bool has_pkey)
194{
195 printaddr(tcp->u_arg[0]);
196 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
197 printflags64(mmap_prot, tcp->u_arg[2], "PROT_???");
198
199 if (has_pkey)
200 tprintf(", %d", (int) tcp->u_arg[3]);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000201
202 return RVAL_DECODED;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000203}
204
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000205SYS_FUNC(mprotect)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000206{
Elliott Hughesd35df492017-02-15 15:19:05 -0800207 return do_mprotect(tcp, false);
208}
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000209
Elliott Hughesd35df492017-02-15 15:19:05 -0800210SYS_FUNC(pkey_mprotect)
211{
212 return do_mprotect(tcp, true);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000213}
214
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +0000215#include "xlat/mremap_flags.h"
Wichert Akkerman2e2553a1999-05-09 00:29:58 +0000216
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000217SYS_FUNC(mremap)
Wichert Akkerman2e2553a1999-05-09 00:29:58 +0000218{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000219 printaddr(tcp->u_arg[0]);
Elliott Hughesd35df492017-02-15 15:19:05 -0800220 tprintf(", %" PRI_klu ", %" PRI_klu ", ", tcp->u_arg[1], tcp->u_arg[2]);
221 printflags64(mremap_flags, tcp->u_arg[3], "MREMAP_???");
Dmitry V. Levinfdc45592009-12-24 23:34:58 +0000222#ifdef MREMAP_FIXED
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000223 if ((tcp->u_arg[3] & (MREMAP_MAYMOVE | MREMAP_FIXED)) ==
224 (MREMAP_MAYMOVE | MREMAP_FIXED)) {
225 tprints(", ");
226 printaddr(tcp->u_arg[4]);
Wichert Akkerman2e2553a1999-05-09 00:29:58 +0000227 }
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000228#endif
229 return RVAL_DECODED | RVAL_HEX;
Wichert Akkerman2e2553a1999-05-09 00:29:58 +0000230}
231
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +0000232#include "xlat/madvise_cmds.h"
Wichert Akkermanc7926982000-04-10 22:22:31 +0000233
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000234SYS_FUNC(madvise)
Wichert Akkermanc7926982000-04-10 22:22:31 +0000235{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000236 printaddr(tcp->u_arg[0]);
Elliott Hughesd35df492017-02-15 15:19:05 -0800237 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000238 printxval(madvise_cmds, tcp->u_arg[2], "MADV_???");
239
240 return RVAL_DECODED;
Wichert Akkermanc7926982000-04-10 22:22:31 +0000241}
242
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +0000243#include "xlat/mlockall_flags.h"
Wichert Akkermanc7926982000-04-10 22:22:31 +0000244
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000245SYS_FUNC(mlockall)
Wichert Akkermanc7926982000-04-10 22:22:31 +0000246{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000247 printflags(mlockall_flags, tcp->u_arg[0], "MCL_???");
248
249 return RVAL_DECODED;
Wichert Akkermanc7926982000-04-10 22:22:31 +0000250}
251
Dmitry V. Levin0ed617b2014-04-25 23:30:54 +0000252#include "xlat/mctl_sync.h"
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000253
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000254SYS_FUNC(msync)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000255{
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000256 /* addr */
257 printaddr(tcp->u_arg[0]);
258 /* len */
Elliott Hughesd35df492017-02-15 15:19:05 -0800259 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000260 /* flags */
261 printflags(mctl_sync, tcp->u_arg[2], "MS_???");
262
263 return RVAL_DECODED;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000264}
265
Dmitry V. Levin0d0a50a2015-11-15 02:35:57 +0000266#include "xlat/mlock_flags.h"
267
268SYS_FUNC(mlock2)
269{
270 printaddr(tcp->u_arg[0]);
Elliott Hughesd35df492017-02-15 15:19:05 -0800271 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
Dmitry V. Levin0d0a50a2015-11-15 02:35:57 +0000272 printflags(mlock_flags, tcp->u_arg[2], "MLOCK_???");
273
274 return RVAL_DECODED;
275}
276
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000277SYS_FUNC(mincore)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000278{
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000279 if (entering(tcp)) {
Dmitry V. Levin2c389f62015-07-19 23:25:56 +0000280 printaddr(tcp->u_arg[0]);
Elliott Hughesd35df492017-02-15 15:19:05 -0800281 tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000282 } else {
Dmitry V. Levindfea1da2016-01-29 01:51:54 +0000283 const unsigned long page_size = get_pagesize();
284 const unsigned long page_mask = page_size - 1;
285 unsigned long len = tcp->u_arg[1];
286 unsigned char *vec = NULL;
Denys Vlasenko1d46ba52011-08-31 14:00:02 +0200287
Dmitry V. Levindfea1da2016-01-29 01:51:54 +0000288 len = len / page_size + (len & page_mask ? 1 : 0);
Dmitry V. Levin2c389f62015-07-19 23:25:56 +0000289 if (syserror(tcp) || !verbose(tcp) ||
290 !tcp->u_arg[2] || !(vec = malloc(len)) ||
291 umoven(tcp, tcp->u_arg[2], len, vec) < 0)
292 printaddr(tcp->u_arg[2]);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000293 else {
Dmitry V. Levindfea1da2016-01-29 01:51:54 +0000294 unsigned long i;
Denys Vlasenko60fe8c12011-09-01 10:00:28 +0200295 tprints("[");
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000296 for (i = 0; i < len; i++) {
Elliott Hughesd35df492017-02-15 15:19:05 -0800297 if (i)
298 tprints(", ");
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000299 if (abbrev(tcp) && i >= max_strlen) {
Denys Vlasenko60fe8c12011-09-01 10:00:28 +0200300 tprints("...");
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000301 break;
302 }
Denys Vlasenko60fe8c12011-09-01 10:00:28 +0200303 tprints((vec[i] & 1) ? "1" : "0");
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000304 }
Denys Vlasenko60fe8c12011-09-01 10:00:28 +0200305 tprints("]");
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000306 }
Denys Vlasenko1d46ba52011-08-31 14:00:02 +0200307 free(vec);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000308 }
309 return 0;
310}
311
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000312SYS_FUNC(remap_file_pages)
Roland McGrath72c5b7b2003-03-05 04:08:00 +0000313{
Elliott Hughesd35df492017-02-15 15:19:05 -0800314 const kernel_ulong_t addr = tcp->u_arg[0];
315 const kernel_ulong_t size = tcp->u_arg[1];
316 const kernel_ulong_t prot = tcp->u_arg[2];
317 const kernel_ulong_t pgoff = tcp->u_arg[3];
318 const kernel_ulong_t flags = tcp->u_arg[4];
Dmitry V. Levin3ae86902016-04-01 15:31:23 +0000319
320 printaddr(addr);
Elliott Hughesd35df492017-02-15 15:19:05 -0800321 tprintf(", %" PRI_klu ", ", size);
322 printflags64(mmap_prot, prot, "PROT_???");
323 tprintf(", %" PRI_klu ", ", pgoff);
Elliott Hughesb7556142018-02-20 17:03:16 -0800324 print_mmap_flags(flags);
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000325
326 return RVAL_DECODED;
Roland McGrath72c5b7b2003-03-05 04:08:00 +0000327}
Roland McGrathb10a3352004-10-07 18:53:12 +0000328
Denys Vlasenko84703742012-02-25 02:38:52 +0100329#if defined(POWERPC)
Dmitry V. Levin0f04b9d2016-05-07 23:00:52 +0000330static bool
331print_protmap_entry(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
332{
Elliott Hughesdc75b012017-07-05 13:54:44 -0700333 tprintf("%#08x", *(unsigned int *) elem_buf);
Dmitry V. Levin0f04b9d2016-05-07 23:00:52 +0000334
335 return true;
336}
337
Dmitry V. Levina0bd3742015-04-07 01:36:50 +0000338SYS_FUNC(subpage_prot)
Roland McGrath4a6f6522008-08-25 03:09:16 +0000339{
Elliott Hughesd35df492017-02-15 15:19:05 -0800340 kernel_ulong_t addr = tcp->u_arg[0];
341 kernel_ulong_t len = tcp->u_arg[1];
342 kernel_ulong_t nmemb = len >> 16;
343 kernel_ulong_t map = tcp->u_arg[2];
Roland McGrath4a6f6522008-08-25 03:09:16 +0000344
Dmitry V. Levin0f04b9d2016-05-07 23:00:52 +0000345 printaddr(addr);
Elliott Hughesd35df492017-02-15 15:19:05 -0800346 tprintf(", %" PRI_klu ", ", len);
Dmitry V. Levin0f04b9d2016-05-07 23:00:52 +0000347
348 unsigned int entry;
349 print_array(tcp, map, nmemb, &entry, sizeof(entry),
350 umoven_or_printaddr, print_protmap_entry, 0);
Roland McGrath4a6f6522008-08-25 03:09:16 +0000351
Dmitry V. Levin85813ce2015-07-19 23:37:40 +0000352 return RVAL_DECODED;
Roland McGrath4a6f6522008-08-25 03:09:16 +0000353}
354#endif