1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* Copyright (c) 2002-2004 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Nathan Binkert
* Steve Reinhardt
*/
#include <sys/mman.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <cstdio>
#include <list>
#include <string>
#include "base/loader/aout_object.hh"
#include "base/loader/dtb_object.hh"
#include "base/loader/ecoff_object.hh"
#include "base/loader/elf_object.hh"
#include "base/loader/object_file.hh"
#include "base/loader/raw_object.hh"
#include "base/loader/symtab.hh"
#include "base/cprintf.hh"
#include "mem/port_proxy.hh"
using namespace std;
ObjectFile::ObjectFile(const string &_filename, int _fd,
size_t _len, uint8_t *_data,
Arch _arch, OpSys _opSys)
: filename(_filename), descriptor(_fd), fileData(_data), len(_len),
arch(_arch), opSys(_opSys), globalPtr(0)
{
}
ObjectFile::~ObjectFile()
{
close();
}
bool
ObjectFile::loadSection(Section *sec, PortProxy& memProxy, Addr addrMask)
{
if (sec->size != 0) {
Addr addr = sec->baseAddr & addrMask;
if (sec->fileImage) {
memProxy.writeBlob(addr, sec->fileImage, sec->size);
}
else {
// no image: must be bss
memProxy.memsetBlob(addr, 0, sec->size);
}
}
return true;
}
bool
ObjectFile::loadSections(PortProxy& memProxy, Addr addrMask)
{
return (loadSection(&text, memProxy, addrMask)
&& loadSection(&data, memProxy, addrMask)
&& loadSection(&bss, memProxy, addrMask));
}
void
ObjectFile::close()
{
if (descriptor >= 0) {
::close(descriptor);
descriptor = -1;
}
if (fileData) {
::munmap((char*)fileData, len);
fileData = NULL;
}
}
ObjectFile *
createObjectFile(const string &fname, bool raw)
{
// open the file
int fd = open(fname.c_str(), O_RDONLY);
if (fd < 0) {
return NULL;
}
// find the length of the file by seeking to the end
size_t len = (size_t)lseek(fd, 0, SEEK_END);
// mmap the whole shebang
uint8_t *fileData =
(uint8_t *)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
if (fileData == MAP_FAILED) {
close(fd);
return NULL;
}
ObjectFile *fileObj = NULL;
// figure out what we have here
if ((fileObj = EcoffObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
if ((fileObj = AoutObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
if ((fileObj = ElfObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
if ((fileObj = DtbObject::tryFile(fname, fd, len, fileData)) != NULL) {
return fileObj;
}
if (raw)
return RawObject::tryFile(fname, fd, len, fileData);
// don't know what it is
close(fd);
munmap((char*)fileData, len);
return NULL;
}
|
