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1 : : /*
2 : : * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
3 : : * Copyright (c) 2014-2017 The strace developers.
4 : : * All rights reserved.
5 : : *
6 : : * Redistribution and use in source and binary forms, with or without
7 : : * modification, are permitted provided that the following conditions
8 : : * are met:
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.
16 : : *
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.
27 : : */
28 : :
29 : : #include "defs.h"
30 : :
31 : : #include "xlat/kexec_load_flags.h"
32 : : #include "xlat/kexec_arch_values.h"
33 : :
34 : : #ifndef KEXEC_ARCH_MASK
35 : : # define KEXEC_ARCH_MASK 0xffff0000
36 : : #endif
37 : : #ifndef KEXEC_SEGMENT_MAX
38 : : # define KEXEC_SEGMENT_MAX 16
39 : : #endif
40 : :
41 : : static bool
42 : 64 : print_seg(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
43 : : {
44 : : const kernel_ulong_t *seg;
45 : : kernel_ulong_t seg_buf[4];
46 : :
47 [ + + ]: 64 : if (elem_size < sizeof(seg_buf)) {
48 : : unsigned int i;
49 : :
50 [ + + ]: 160 : for (i = 0; i < ARRAY_SIZE(seg_buf); ++i)
51 : 128 : seg_buf[i] = ((unsigned int *) elem_buf)[i];
52 : : seg = seg_buf;
53 : : } else {
54 : : seg = elem_buf;
55 : : }
56 : :
57 : 64 : tprints("{buf=");
58 : 64 : printaddr(seg[0]);
59 : 64 : tprintf(", bufsz=%" PRI_klu ", mem=", seg[1]);
60 : 64 : printaddr(seg[2]);
61 : 64 : tprintf(", memsz=%" PRI_klu "}", seg[3]);
62 : :
63 : 64 : return true;
64 : : }
65 : :
66 : : static void
67 : 14 : print_kexec_segments(struct tcb *const tcp, const kernel_ulong_t addr,
68 : : const kernel_ulong_t len)
69 : : {
70 [ + + ]: 14 : if (len > KEXEC_SEGMENT_MAX) {
71 : 4 : printaddr(addr);
72 : 4 : return;
73 : : }
74 : :
75 : : kernel_ulong_t seg[4];
76 : 10 : const size_t sizeof_seg = ARRAY_SIZE(seg) * current_wordsize;
77 : :
78 : 10 : print_array(tcp, addr, len, seg, sizeof_seg,
79 : : umoven_or_printaddr, print_seg, 0);
80 : : }
81 : :
82 : 14 : SYS_FUNC(kexec_load)
83 : : {
84 : : /* entry, nr_segments */
85 : 14 : printaddr(tcp->u_arg[0]);
86 : 14 : tprintf(", %" PRI_klu ", ", tcp->u_arg[1]);
87 : :
88 : : /* segments */
89 : 14 : print_kexec_segments(tcp, tcp->u_arg[2], tcp->u_arg[1]);
90 : 14 : tprints(", ");
91 : :
92 : : /* flags */
93 : 14 : kernel_ulong_t n = tcp->u_arg[3];
94 : 14 : printxval64(kexec_arch_values, n & KEXEC_ARCH_MASK, "KEXEC_ARCH_???");
95 : 14 : n &= ~(kernel_ulong_t) KEXEC_ARCH_MASK;
96 [ + + ]: 14 : if (n) {
97 : 8 : tprints("|");
98 : : printflags64(kexec_load_flags, n, "KEXEC_???");
99 : : }
100 : :
101 : 14 : return RVAL_DECODED;
102 : : }
103 : :
104 : : #include "xlat/kexec_file_load_flags.h"
105 : :
106 : 21 : SYS_FUNC(kexec_file_load)
107 : : {
108 : : /* kernel_fd */
109 : 21 : printfd(tcp, tcp->u_arg[0]);
110 : 21 : tprints(", ");
111 : : /* initrd_fd */
112 : 21 : printfd(tcp, tcp->u_arg[1]);
113 : 21 : tprints(", ");
114 : : /* cmdline_len */
115 : 21 : tprintf("%" PRI_klu ", ", tcp->u_arg[2]);
116 : : /* cmdline */
117 : 21 : printstrn(tcp, tcp->u_arg[3], tcp->u_arg[2]);
118 : 21 : tprints(", ");
119 : : /* flags */
120 : 21 : printflags64(kexec_file_load_flags, tcp->u_arg[4], "KEXEC_FILE_???");
121 : :
122 : 21 : return RVAL_DECODED;
123 : : }
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