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
|
/***************************************************Project Mutator****************************************************/
//-*-c++-*-
/*first line intentionally left blank.*/
/*loads the objects into executable memory and registers them with lua.*/
/*Copyright (C) 2017 Farzad Sadeghi
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.*/
/**********************************************************************************************************************/
#include <iostream>
#include <tuple>
#include <vector>
#include <cstdint>
#include <cstdarg>
#include <cstring>
#include <sys/mman.h>
#include <unistd.h>
#include "lua-5.3.4/src/lua.hpp"
/**********************************************************************************************************************/
#ifndef EXECUTIONER_H
#define EXECUTIONER_H
/**********************************************************************************************************************/
namespace { // start of anonymous namespace
using XObject = void(*)(void);
constexpr int MEMORY_SIZE = 32768;
std::vector<uint8_t> memory(MEMORY_SIZE, 0);
void* alloc_writeable_memory(size_t _size) {
void* ptr = mmap(0, _size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (ptr == (void*)-1) {
perror("could not allocate virtual memory.");
return nullptr;
}
return ptr;
}
int make_mem_executable(void* _mem, size_t _size) {
if (mprotect(_mem, _size, PROT_READ | PROT_EXEC) == -1) {
perror("could not make virtual memory executable.");
return -1;
}
return 0;
}
int LuaGenericWrapper(lua_State* __ls, XObject __x) {
int numargs = lua_gettop(__ls);
std::vector<uint64_t> arg_vec;
for (int i = 0; i < numargs; ++i) {
arg_vec.push_back(lua_tonumber(__ls, i + 1));
}
pid_t pid = fork();
if (pid < 0) {
//PRINT_WITH_COLOR_LB(RED, "could not fork...");
lua_pushnumber(__ls, EXIT_FAILURE);
}
if (pid == 0) {}
if (pid > 0) {
__x;
}
return 0;
}
} // end of anonymous namespace
int getMemorySize(void) {return MEMORY_SIZE;}
class Executioner {
public:
Executioner() {}
~Executioner() {
for (auto &iter : obj_mem_ptrs) {
if (iter.first != nullptr) {
if (munmap(iter.first, iter.second) < 0) {
perror("could not unmap vmemory.");
}
}
}
}
void getObjs(std::vector<std::vector<uint8_t>>& _objs) {objs = _objs;}
void getNames(std::vector<std::string>& _names) {names = _names;}
std::pair<void*, size_t> loadObjsInXMem(std::vector<uint8_t>& _obj_code) {
size_t code_size = _obj_code.size();
void* program_memory = alloc_writeable_memory(code_size);
if (program_memory == nullptr) {
std::cout << "could not allocate virtual memory\n";
return std::make_pair(nullptr, 0);
}
memcpy(program_memory, _obj_code.data(), code_size);
if (make_mem_executable(program_memory, code_size) < 0) {
std::cout << "could not make vmemory executable.\n";
return std::make_pair(nullptr, 0);
}
return std::make_pair(program_memory, code_size);
}
void loadAll(void) {
for (auto &iter : objs) {
this->loadObjsInXMem(iter);
}
}
void emitByte(uint8_t _byte, std::vector<uint8_t>& _code) {
_code.push_back(_byte);
}
void emitBytes(std::vector<uint8_t>& _bytes, std::vector<uint8_t>& _code) {
for (auto &iter : _bytes) {this->emitByte(iter, _code);}
}
void registerWithLua(lua_State* _lua_State) {
for (auto& iter : names) {
//lua_register(_lua_State, iter.c_str(), LuaGeneric);
}
}
void xobjsGetPtrs(void) {
for (auto& iter : obj_mem_ptrs) {
XObject dummy = (XObject)iter.first;
xobjs.push_back(dummy);
}
}
private:
std::vector<std::pair<void*, size_t>> obj_mem_ptrs;
std::vector<std::vector<uint8_t>> objs;
std::vector<std::string> names;
std::vector<XObject> xobjs;
};
/**********************************************************************************************************************/
#endif
/**********************************************************************************************************************/
/*last line intentionally left blank.*/
|
