1 /*
2 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "defs.h"
29
30 #include "xlat/kexec_load_flags.h"
31 #include "xlat/kexec_arch_values.h"
32
33 #ifndef KEXEC_ARCH_MASK
34 # define KEXEC_ARCH_MASK 0xffff0000
35 #endif
36 #ifndef KEXEC_SEGMENT_MAX
37 # define KEXEC_SEGMENT_MAX 16
38 #endif
39
40 static void
print_seg(const unsigned long * seg)41 print_seg(const unsigned long *seg)
42 {
43 tprints("{");
44 printaddr(seg[0]);
45 tprintf(", %lu, ", seg[1]);
46 printaddr(seg[2]);
47 tprintf(", %lu}", seg[3]);
48 }
49
50 static void
print_kexec_segments(struct tcb * tcp,const unsigned long addr,const unsigned long len)51 print_kexec_segments(struct tcb *tcp, const unsigned long addr,
52 const unsigned long len)
53 {
54 unsigned long seg[4];
55 const size_t sizeof_seg = ARRAY_SIZE(seg) * current_wordsize;
56 unsigned int i;
57
58 if (!len) {
59 tprints("[]");
60 return;
61 }
62
63 if (len > KEXEC_SEGMENT_MAX) {
64 printaddr(addr);
65 return;
66 }
67
68 if (umove_ulong_array_or_printaddr(tcp, addr, seg, ARRAY_SIZE(seg)))
69 return;
70
71 tprints("[");
72 print_seg(seg);
73
74 for (i = 1; i < len; ++i) {
75 tprints(", ");
76 if (umove_ulong_array_or_printaddr(tcp,
77 addr + i * sizeof_seg,
78 seg, ARRAY_SIZE(seg)))
79 break;
80 print_seg(seg);
81 }
82
83 tprints("]");
84 }
85
SYS_FUNC(kexec_load)86 SYS_FUNC(kexec_load)
87 {
88 unsigned long n;
89
90 /* entry, nr_segments */
91 printaddr(tcp->u_arg[0]);
92 tprintf(", %lu, ", tcp->u_arg[1]);
93
94 /* segments */
95 print_kexec_segments(tcp, tcp->u_arg[2], tcp->u_arg[1]);
96 tprints(", ");
97
98 /* flags */
99 n = tcp->u_arg[3];
100 printxval(kexec_arch_values, n & KEXEC_ARCH_MASK, "KEXEC_ARCH_???");
101 n &= ~KEXEC_ARCH_MASK;
102 if (n) {
103 tprints("|");
104 printflags(kexec_load_flags, n, "KEXEC_???");
105 }
106
107 return RVAL_DECODED;
108 }
109
110 #include "xlat/kexec_file_load_flags.h"
111
SYS_FUNC(kexec_file_load)112 SYS_FUNC(kexec_file_load)
113 {
114 /* kernel_fd */
115 printfd(tcp, tcp->u_arg[0]);
116 tprints(", ");
117 /* initrd_fd */
118 printfd(tcp, tcp->u_arg[1]);
119 tprints(", ");
120 /* cmdline_len */
121 tprintf("%lu, ", tcp->u_arg[2]);
122 /* cmdline */
123 printstr(tcp, tcp->u_arg[3], tcp->u_arg[2]);
124 tprints(", ");
125 /* flags */
126 printflags(kexec_file_load_flags, tcp->u_arg[4], "KEXEC_FILE_???");
127
128 return RVAL_DECODED;
129 }
130