1/*
2 * Copyright (c) 2009 The Regents of The University of Michigan
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 are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * 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
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 */
30
31#include "kern/linux/linux.hh"
32
33#include <cstdio>
34#include <string>
35
36#include "cpu/base.hh"
37#include "debug/SyscallVerbose.hh"
38#include "sim/process.hh"
39#include "sim/system.hh"
40
41int
42Linux::openSpecialFile(std::string path, Process *process,
43 ThreadContext *tc)
44{
45 DPRINTFR(SyscallVerbose,
46 "%d: %s: generic-open: opening special file: %s\n",
47 curTick(), tc->getCpuPtr()->name(), path.c_str());
48
49 bool matched = false;
50 std::string data;
51
52 if (path.compare(0, 13, "/proc/meminfo") == 0) {
53 data = Linux::procMeminfo(process, tc);
54 matched = true;
55 } else if (path.compare(0, 11, "/etc/passwd") == 0) {
56 data = Linux::etcPasswd(process, tc);
57 matched = true;
| 1/*
2 * Copyright (c) 2009 The Regents of The University of Michigan
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 are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * 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
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 */
30
31#include "kern/linux/linux.hh"
32
33#include <cstdio>
34#include <string>
35
36#include "cpu/base.hh"
37#include "debug/SyscallVerbose.hh"
38#include "sim/process.hh"
39#include "sim/system.hh"
40
41int
42Linux::openSpecialFile(std::string path, Process *process,
43 ThreadContext *tc)
44{
45 DPRINTFR(SyscallVerbose,
46 "%d: %s: generic-open: opening special file: %s\n",
47 curTick(), tc->getCpuPtr()->name(), path.c_str());
48
49 bool matched = false;
50 std::string data;
51
52 if (path.compare(0, 13, "/proc/meminfo") == 0) {
53 data = Linux::procMeminfo(process, tc);
54 matched = true;
55 } else if (path.compare(0, 11, "/etc/passwd") == 0) {
56 data = Linux::etcPasswd(process, tc);
57 matched = true;
|
58 }
59
60 if (matched) {
61 FILE *f = tmpfile();
62 int fd = fileno(f);
63 size_t ret M5_VAR_USED = fwrite(data.c_str(), 1, data.size(), f);
64 assert(ret == data.size());
65 rewind(f);
66 return fd;
67 } else {
68 warn("Attempting to open special file: %s. Ignoring. Simulation may "
69 "take un-expected code path or be non-deterministic until proper "
70 "handling is implemented.\n", path.c_str());
71 errno = EACCES;
72 return -1;
73 }
74}
75
76std::string
77Linux::procMeminfo(Process *process, ThreadContext *tc)
78{
79 return csprintf("MemTotal:%12d kB\nMemFree: %12d kB\n",
80 process->system->memSize() >> 10,
81 process->system->freeMemSize() >> 10);
82}
83
84std::string
85Linux::etcPasswd(Process *process, ThreadContext *tc)
86{
87 return csprintf("gem5-user:x:1000:1000:gem5-user,,,:%s:/bin/bash\n",
88 process->getcwd());
89}
| 61 }
62
63 if (matched) {
64 FILE *f = tmpfile();
65 int fd = fileno(f);
66 size_t ret M5_VAR_USED = fwrite(data.c_str(), 1, data.size(), f);
67 assert(ret == data.size());
68 rewind(f);
69 return fd;
70 } else {
71 warn("Attempting to open special file: %s. Ignoring. Simulation may "
72 "take un-expected code path or be non-deterministic until proper "
73 "handling is implemented.\n", path.c_str());
74 errno = EACCES;
75 return -1;
76 }
77}
78
79std::string
80Linux::procMeminfo(Process *process, ThreadContext *tc)
81{
82 return csprintf("MemTotal:%12d kB\nMemFree: %12d kB\n",
83 process->system->memSize() >> 10,
84 process->system->freeMemSize() >> 10);
85}
86
87std::string
88Linux::etcPasswd(Process *process, ThreadContext *tc)
89{
90 return csprintf("gem5-user:x:1000:1000:gem5-user,,,:%s:/bin/bash\n",
91 process->getcwd());
92}
|