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
|
/*
* Copyright (c) 2003 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.
*/
#include <list>
#include <string>
#include <sys/types.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "base/cprintf.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
#include "base/loader/ecoff_object.hh"
#include "base/loader/aout_object.hh"
#include "base/loader/elf_object.hh"
using namespace std;
ObjectFile::ObjectFile(const string &_filename, int _fd,
size_t _len, uint8_t *_data)
: filename(_filename), descriptor(_fd), fileData(_data), len(_len)
{
}
ObjectFile::~ObjectFile()
{
close();
}
void
ObjectFile::close()
{
if (descriptor >= 0) {
::close(descriptor);
descriptor = -1;
}
if (fileData) {
::munmap(fileData, len);
fileData = NULL;
}
}
ObjectFile *
createObjectFile(const string &fname)
{
// 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;
}
// don't know what it is
close(fd);
munmap(fileData, len);
return NULL;
}
|
