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<li class="navelem"><a class="el" href="../../dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="../../dir_ef99456410776b930b88f5850437ce61.html">obf</a></li><li class="navelem"><a class="el" href="../../dir_fa1ee7704f0ab8e5fd961a68bf21be50.html">transform</a></li> </ul>
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<div class="headertitle"><div class="title">gen.hpp</div></div>
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<a href="../../d5/d18/gen_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright (c) 2022, _xeroxz</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// All rights reserved.</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">//</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// Redistribution and use in source and binary forms, with or without</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">// modification, are permitted provided that the following conditions are met:</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">//</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">// 1. Redistributions of source code must retain the above copyright notice,</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// this list of conditions and the following disclaimer.</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">//</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// 2. Redistributions in binary form must reproduce the above copyright notice,</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment">// this list of conditions and the following disclaimer in the documentation</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// and/or other materials provided with the distribution.</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment">//</span></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment">// 3. Neither the name of the copyright holder nor the names of its</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment">// contributors may be used to endorse or promote products derived from</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment">// this software without specific prior written permission.</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment">//</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"</span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="comment">// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="comment">// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="comment">// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="comment">// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="comment">// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="comment">// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="comment">// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="comment">// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="comment">// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="comment">// POSSIBILITY OF SUCH DAMAGE.</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="comment">//</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="preprocessor">#pragma once</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#include <<a class="code" href="../../d6/deb/transform_8hpp.html">obf/transform/transform.hpp</a>></span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#include <<a class="code" href="../../d1/d82/reloc_8hpp.html">recomp/reloc.hpp</a>></span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html" title="this namespace encompasses the code for transforming relocations.">theo::obf::transform</a> {<span class="comment"></span></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment">/// <summary></span></div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment">/// generate a sequence of transformations given an instruction that has a</span></div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment">/// relocation in it.</span></div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment">/// </summary></span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">/// <param name="inst">instruction that has a relocation in it.</param></span></div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment">/// <param name="reloc">meta data relocation object for the instruction.</param></span></div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment">/// <param name="low">lowest number of transformations to generate.</param></span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment">/// <param name="high">highest number of transformations to generate.</param></span></div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment">/// <returns></returns></span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"><a class="line" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html#abb618f5ff8d88963dd77e682456ef982"> 45</a></span><span class="comment"></span><span class="keyword">inline</span> std::vector<std::uint8_t> <a class="code hl_function" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html#abb618f5ff8d88963dd77e682456ef982" title="generate a sequence of transformations given an instruction that has a relocation in it.">generate</a>(xed_decoded_inst_t* inst,</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <a class="code hl_class" href="../../dd/d37/classtheo_1_1recomp_1_1reloc__t.html" title="meta data about a relocation for a symbol">recomp::reloc_t</a>* reloc,</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> std::uint8_t low,</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> std::uint8_t high) {</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">auto</span> num_transforms = <a class="code hl_function" href="../../d7/de2/classtheo_1_1obf_1_1transform_1_1operation__t.html#aaa5859bc3c7f95d99d4d726289593488" title="generate a random number in a range.">transform::operation_t::random</a>(low, high);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">auto</span> num_ops = <a class="code hl_variable" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html#a6a4b1d5c0c9c2ea1f0b4ec8f5aba48b0" title="map of all of the operations and their type.">transform::operations</a>.size();</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> std::vector<std::uint8_t> new_inst_bytes;</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> std::uint32_t inst_len = {};</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> std::uint8_t inst_buff[XED_MAX_INSTRUCTION_BYTES];</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> xed_encoder_request_t req;</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> xed_state_t istate{XED_MACHINE_MODE_LONG_64, XED_ADDRESS_WIDTH_64b};</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> xed_encoder_request_zero_set_mode(&req, &istate);</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> xed_encoder_request_set_effective_operand_width(&req, 64);</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> xed_encoder_request_set_iclass(&req, XED_ICLASS_PUSHFQ);</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> xed_encode(&req, inst_buff, <span class="keyword">sizeof</span>(inst_buff), &inst_len);</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> new_inst_bytes.insert(new_inst_bytes.end(), inst_buff, inst_buff + inst_len);</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> </div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> cnt = 0u; cnt < num_transforms; ++cnt) {</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> std::uint32_t imm = <a class="code hl_function" href="../../d7/de2/classtheo_1_1obf_1_1transform_1_1operation__t.html#aaa5859bc3c7f95d99d4d726289593488" title="generate a random number in a range.">transform::operation_t::random</a>(</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> 0, std::numeric_limits<std::int32_t>::max());</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">auto</span> itr = <a class="code hl_variable" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html#a6a4b1d5c0c9c2ea1f0b4ec8f5aba48b0" title="map of all of the operations and their type.">transform::operations</a>.begin();</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> std::advance(itr, <a class="code hl_function" href="../../d7/de2/classtheo_1_1obf_1_1transform_1_1operation__t.html#aaa5859bc3c7f95d99d4d726289593488" title="generate a random number in a range.">transform::operation_t::random</a>(0, num_ops - 1));</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">auto</span> transform_bytes = itr->second->native(inst, imm);</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> new_inst_bytes.insert(new_inst_bytes.end(), transform_bytes.begin(),</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> transform_bytes.end());</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> reloc-><a class="code hl_function" href="../../dd/d37/classtheo_1_1recomp_1_1reloc__t.html#ab5214a9ff9135672e25f40406c37fb10" title="adds a transformation to be applied to the relocation prior to writing it into the symbol.">add_transform</a>(</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> {<a class="code hl_variable" href="../../d8/d82/namespacetheo_1_1obf_1_1transform.html#a6a4b1d5c0c9c2ea1f0b4ec8f5aba48b0" title="map of all of the operations and their type.">transform::operations</a>[itr->second->inverse()]->get_transform(), imm});</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> }</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> xed_encoder_request_zero_set_mode(&req, &istate);</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> xed_encoder_request_set_effective_operand_width(&req, 64);</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> xed_encoder_request_set_iclass(&req, XED_ICLASS_POPFQ);</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> xed_encode(&req, inst_buff, <span class="keyword">sizeof</span>(inst_buff), &inst_len);</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> new_inst_bytes.insert(new_inst_bytes.end(), inst_buff, inst_buff + inst_len);</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> </div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="comment">// inverse the order in which the transformations are executed...</span></div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="comment">//</span></div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> std::reverse(reloc-><a class="code hl_function" href="../../dd/d37/classtheo_1_1recomp_1_1reloc__t.html#af8abfa7a4f1052308a233629faf39a78" title="gets the vector of transformation.">get_transforms</a>().begin(), reloc-><a class="code hl_function" href="../../dd/d37/classtheo_1_1recomp_1_1reloc__t.html#af8abfa7a4f1052308a233629faf39a78" title="gets the vector of transformation.">get_transforms</a>().end());</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">return</span> new_inst_bytes;</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>}</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span>} <span class="comment">// namespace theo::obf::transform</span></div>
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