2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2017 The strace developers.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include "print_fields.h"
33 #include "xlat/uffd_flags.h"
37 printflags(uffd_flags, tcp->u_arg[0], "UFFD_???");
39 return RVAL_DECODED | RVAL_FD;
42 #ifdef HAVE_LINUX_USERFAULTFD_H
43 # include <linux/ioctl.h>
44 # include <linux/userfaultfd.h>
46 # include "xlat/uffd_api_features.h"
47 # include "xlat/uffd_api_flags.h"
48 # include "xlat/uffd_copy_flags.h"
49 # include "xlat/uffd_register_ioctl_flags.h"
50 # include "xlat/uffd_register_mode_flags.h"
51 # include "xlat/uffd_zeropage_flags.h"
54 tprintf_uffdio_range(const struct uffdio_range *range)
56 PRINT_FIELD_X("{", *range, start);
57 PRINT_FIELD_X(", ", *range, len);
61 #define PRINT_FIELD_UFFDIO_RANGE(prefix_, where_, field_) \
63 STRACE_PRINTF("%s%s=", (prefix_), #field_); \
64 tprintf_uffdio_range(&(where_).field_); \
68 uffdio_ioctl(struct tcb *const tcp, const unsigned int code,
69 const kernel_ulong_t arg)
73 uint64_t *entering_features;
77 if (umove_or_printaddr(tcp, arg, &ua))
78 return RVAL_DECODED | 1;
79 PRINT_FIELD_X("{", ua, api);
80 PRINT_FIELD_FLAGS(", ", ua, features, uffd_api_features,
82 entering_features = malloc(sizeof(*entering_features));
83 if (entering_features) {
84 *entering_features = ua.features;
85 set_tcb_priv_data(tcp, entering_features, free);
88 if (!syserror(tcp) && !umove(tcp, arg, &ua)) {
89 entering_features = get_tcb_priv_data(tcp);
90 if (!entering_features
91 || *entering_features != ua.features) {
92 PRINT_FIELD_FLAGS(" => ", ua, features,
96 PRINT_FIELD_FLAGS(", ", ua, ioctls,
106 struct uffdio_copy uc;
109 if (umove_or_printaddr(tcp, arg, &uc))
110 return RVAL_DECODED | 1;
111 PRINT_FIELD_X("{", uc, dst);
112 PRINT_FIELD_X(", ", uc, src);
113 PRINT_FIELD_X(", ", uc, len);
114 PRINT_FIELD_FLAGS(", ", uc, mode, uffd_copy_flags,
117 if (!syserror(tcp) && !umove(tcp, arg, &uc))
118 PRINT_FIELD_X(", ", uc, copy);
124 case UFFDIO_REGISTER: {
125 struct uffdio_register ur;
128 if (umove_or_printaddr(tcp, arg, &ur))
129 return RVAL_DECODED | 1;
130 PRINT_FIELD_UFFDIO_RANGE("{", ur, range);
131 PRINT_FIELD_FLAGS(", ", ur, mode,
132 uffd_register_mode_flags,
133 "UFFDIO_REGISTER_MODE_???");
135 if (!syserror(tcp) && !umove(tcp, arg, &ur)) {
136 PRINT_FIELD_FLAGS(", ", ur, ioctls,
137 uffd_register_ioctl_flags,
145 case UFFDIO_UNREGISTER:
147 struct uffdio_range ura;
149 if (!umove_or_printaddr(tcp, arg, &ura))
150 tprintf_uffdio_range(&ura);
151 return RVAL_DECODED | 1;
154 case UFFDIO_ZEROPAGE: {
155 struct uffdio_zeropage uz;
158 if (umove_or_printaddr(tcp, arg, &uz))
159 return RVAL_DECODED | 1;
160 PRINT_FIELD_UFFDIO_RANGE("{", uz, range);
161 PRINT_FIELD_FLAGS(", ", uz, mode, uffd_zeropage_flags,
162 "UFFDIO_ZEROPAGE_???");
164 if (!syserror(tcp) && !umove(tcp, arg, &uz))
165 PRINT_FIELD_X(", ", uz, zeropage);
175 #endif /* HAVE_LINUX_USERFAULTFD_H */