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;
78 if (umove_or_printaddr(tcp, arg, &ua))
80 PRINT_FIELD_X("{", ua, api);
81 PRINT_FIELD_FLAGS(", ", ua, features, uffd_api_features,
83 entering_features = malloc(sizeof(*entering_features));
84 if (entering_features) {
85 *entering_features = ua.features;
86 set_tcb_priv_data(tcp, entering_features, free);
92 if (!syserror(tcp) && !umove(tcp, arg, &ua)) {
93 entering_features = get_tcb_priv_data(tcp);
95 if (!entering_features
96 || *entering_features != ua.features) {
97 PRINT_FIELD_FLAGS(" => ", ua, features,
102 PRINT_FIELD_FLAGS(", ", ua, ioctls, uffd_api_flags,
112 struct uffdio_copy uc;
116 if (umove_or_printaddr(tcp, arg, &uc))
117 return RVAL_IOCTL_DECODED;
118 PRINT_FIELD_X("{", uc, dst);
119 PRINT_FIELD_X(", ", uc, src);
120 PRINT_FIELD_X(", ", uc, len);
121 PRINT_FIELD_FLAGS(", ", uc, mode, uffd_copy_flags,
127 if (!syserror(tcp) && !umove(tcp, arg, &uc))
128 PRINT_FIELD_X(", ", uc, copy);
135 case UFFDIO_REGISTER: {
136 struct uffdio_register ur;
140 if (umove_or_printaddr(tcp, arg, &ur))
141 return RVAL_IOCTL_DECODED;
142 PRINT_FIELD_UFFDIO_RANGE("{", ur, range);
143 PRINT_FIELD_FLAGS(", ", ur, mode,
144 uffd_register_mode_flags,
145 "UFFDIO_REGISTER_MODE_???");
150 if (!syserror(tcp) && !umove(tcp, arg, &ur)) {
151 PRINT_FIELD_FLAGS(", ", ur, ioctls,
152 uffd_register_ioctl_flags,
161 case UFFDIO_UNREGISTER:
163 struct uffdio_range ura;
167 if (!umove_or_printaddr(tcp, arg, &ura))
168 tprintf_uffdio_range(&ura);
173 case UFFDIO_ZEROPAGE: {
174 struct uffdio_zeropage uz;
178 if (umove_or_printaddr(tcp, arg, &uz))
179 return RVAL_IOCTL_DECODED;
180 PRINT_FIELD_UFFDIO_RANGE("{", uz, range);
181 PRINT_FIELD_FLAGS(", ", uz, mode, uffd_zeropage_flags,
182 "UFFDIO_ZEROPAGE_???");
187 if (!syserror(tcp) && !umove(tcp, arg, &uz))
188 PRINT_FIELD_X(", ", uz, zeropage);
199 return RVAL_IOCTL_DECODED;
201 #endif /* HAVE_LINUX_USERFAULTFD_H */