1/*
2 * Copyright (c) 2016 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Andreas Sandberg
38 */
39
40#include "kern/linux/helpers.hh"
41
42#include "arch/isa_traits.hh"
43#include "config/the_isa.hh"
44#include "cpu/thread_context.hh"
45#include "mem/fs_translating_port_proxy.hh"
46#include "sim/byteswap.hh"
47#include "sim/system.hh"
48
49struct DmesgEntry {
50 uint64_t ts_nsec;
51 uint16_t len;
52 uint16_t text_len;
53 uint16_t dict_len;
54 uint8_t facility;
55 uint8_t flags;
56} M5_ATTR_PACKED;
57
58static int
59dumpDmesgEntry(const uint8_t *base, const uint8_t *end, std::ostream &os)
60{
61 const size_t max_length = end - base;
62 DmesgEntry de;
63
64 if (max_length < sizeof(de)) {
65 warn("Malformed dmesg entry\n");
66 return -1;
67 }
68
69 memcpy(&de, base, sizeof(de));
70 de.ts_nsec = TheISA::gtoh(de.ts_nsec);
71 de.len = TheISA::gtoh(de.len);
72 de.text_len = TheISA::gtoh(de.text_len);
73
74 if (de.len < sizeof(de) ||
75 max_length < de.len ||
76 max_length < sizeof(DmesgEntry) + de.text_len) {
77
78 warn("Malformed dmesg entry:\n");
79 warn("\tMax length: %i\n", max_length);
80 warn("\tde.len: %i\n", de.len);
81 warn("\tde.text_len: %i\n", de.text_len);
82 return -1;
83 }
84
85 ccprintf(os, "[%.6f] ", de.ts_nsec * 10e-9);
86 os.write((char *)base + sizeof(de), de.text_len);
87 os << std::endl;
88
89 return de.len;
90}
91
92void
93Linux::dumpDmesg(ThreadContext *tc, std::ostream &os)
94{
95 System *system = tc->getSystemPtr();
96 const SymbolTable *symtab = system->kernelSymtab;
| 1/*
2 * Copyright (c) 2016 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Andreas Sandberg
38 */
39
40#include "kern/linux/helpers.hh"
41
42#include "arch/isa_traits.hh"
43#include "config/the_isa.hh"
44#include "cpu/thread_context.hh"
45#include "mem/fs_translating_port_proxy.hh"
46#include "sim/byteswap.hh"
47#include "sim/system.hh"
48
49struct DmesgEntry {
50 uint64_t ts_nsec;
51 uint16_t len;
52 uint16_t text_len;
53 uint16_t dict_len;
54 uint8_t facility;
55 uint8_t flags;
56} M5_ATTR_PACKED;
57
58static int
59dumpDmesgEntry(const uint8_t *base, const uint8_t *end, std::ostream &os)
60{
61 const size_t max_length = end - base;
62 DmesgEntry de;
63
64 if (max_length < sizeof(de)) {
65 warn("Malformed dmesg entry\n");
66 return -1;
67 }
68
69 memcpy(&de, base, sizeof(de));
70 de.ts_nsec = TheISA::gtoh(de.ts_nsec);
71 de.len = TheISA::gtoh(de.len);
72 de.text_len = TheISA::gtoh(de.text_len);
73
74 if (de.len < sizeof(de) ||
75 max_length < de.len ||
76 max_length < sizeof(DmesgEntry) + de.text_len) {
77
78 warn("Malformed dmesg entry:\n");
79 warn("\tMax length: %i\n", max_length);
80 warn("\tde.len: %i\n", de.len);
81 warn("\tde.text_len: %i\n", de.text_len);
82 return -1;
83 }
84
85 ccprintf(os, "[%.6f] ", de.ts_nsec * 10e-9);
86 os.write((char *)base + sizeof(de), de.text_len);
87 os << std::endl;
88
89 return de.len;
90}
91
92void
93Linux::dumpDmesg(ThreadContext *tc, std::ostream &os)
94{
95 System *system = tc->getSystemPtr();
96 const SymbolTable *symtab = system->kernelSymtab;
|
98
99 Addr addr_lb = 0, addr_lb_len = 0, addr_first = 0, addr_next = 0;
100 const bool found_symbols =
101 symtab->findAddress("__log_buf", addr_lb) &&
102 symtab->findAddress("log_buf_len", addr_lb_len) &&
103 symtab->findAddress("log_first_idx", addr_first) &&
104 symtab->findAddress("log_next_idx", addr_next);
105
106 if (!found_symbols) {
107 warn("Failed to find kernel dmesg symbols.\n");
108 return;
109 }
110
111 uint32_t log_buf_len =
112 proxy.read<uint32_t>(addr_lb_len, TheISA::GuestByteOrder);
113 uint32_t log_first_idx =
114 proxy.read<uint32_t>(addr_first, TheISA::GuestByteOrder);
115 uint32_t log_next_idx =
116 proxy.read<uint32_t>(addr_next, TheISA::GuestByteOrder);
117
118 if (log_first_idx >= log_buf_len || log_next_idx >= log_buf_len) {
119 warn("dmesg pointers/length corrupted\n");
120 return;
121 }
122
123 // Normalize and read the dmesg ring buffer
124 std::vector<uint8_t> log_buf(log_buf_len);
125 int length;
126 if (log_first_idx < log_next_idx) {
127 length = log_next_idx - log_first_idx;
128 if (length < 0 || length > log_buf.size()) {
129 warn("Unexpected dmesg buffer length\n");
130 return;
131 }
132 proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length);
133 } else {
134 const int length_2 = log_buf_len - log_first_idx;
135 if (length_2 < 0 || length_2 + log_next_idx > log_buf.size()) {
136 warn("Unexpected dmesg buffer length\n");
137 return;
138 }
139 length = log_buf_len;
140 proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length_2);
141 proxy.readBlob(addr_lb, log_buf.data() + length_2, log_next_idx);
142 }
143
144 // Print dmesg buffer content
145 const uint8_t *cur = log_buf.data(), *end = log_buf.data() + length;
146 while (cur < end) {
147 int ret = dumpDmesgEntry(cur, end, os);
148 if (ret < 0)
149 return;
150 cur += ret;
151 }
152}
| 98
99 Addr addr_lb = 0, addr_lb_len = 0, addr_first = 0, addr_next = 0;
100 const bool found_symbols =
101 symtab->findAddress("__log_buf", addr_lb) &&
102 symtab->findAddress("log_buf_len", addr_lb_len) &&
103 symtab->findAddress("log_first_idx", addr_first) &&
104 symtab->findAddress("log_next_idx", addr_next);
105
106 if (!found_symbols) {
107 warn("Failed to find kernel dmesg symbols.\n");
108 return;
109 }
110
111 uint32_t log_buf_len =
112 proxy.read<uint32_t>(addr_lb_len, TheISA::GuestByteOrder);
113 uint32_t log_first_idx =
114 proxy.read<uint32_t>(addr_first, TheISA::GuestByteOrder);
115 uint32_t log_next_idx =
116 proxy.read<uint32_t>(addr_next, TheISA::GuestByteOrder);
117
118 if (log_first_idx >= log_buf_len || log_next_idx >= log_buf_len) {
119 warn("dmesg pointers/length corrupted\n");
120 return;
121 }
122
123 // Normalize and read the dmesg ring buffer
124 std::vector<uint8_t> log_buf(log_buf_len);
125 int length;
126 if (log_first_idx < log_next_idx) {
127 length = log_next_idx - log_first_idx;
128 if (length < 0 || length > log_buf.size()) {
129 warn("Unexpected dmesg buffer length\n");
130 return;
131 }
132 proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length);
133 } else {
134 const int length_2 = log_buf_len - log_first_idx;
135 if (length_2 < 0 || length_2 + log_next_idx > log_buf.size()) {
136 warn("Unexpected dmesg buffer length\n");
137 return;
138 }
139 length = log_buf_len;
140 proxy.readBlob(addr_lb + log_first_idx, log_buf.data(), length_2);
141 proxy.readBlob(addr_lb, log_buf.data() + length_2, log_next_idx);
142 }
143
144 // Print dmesg buffer content
145 const uint8_t *cur = log_buf.data(), *end = log_buf.data() + length;
146 while (cur < end) {
147 int ret = dumpDmesgEntry(cur, end, os);
148 if (ret < 0)
149 return;
150 cur += ret;
151 }
152}
|