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Parse Mach-O relocations and add MachO API to retrieve section from name
API Update: lief.MachO.Section.relocations - to access to the relocations lief.MachO.binary.get_section - Get section from name lief.MachO.binary.has_section -Check if section with given name exists Resolve #57
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| /* Copyright 2017 R. Thomas | ||
| * Copyright 2017 Quarkslab | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| #include <algorithm> | ||
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| #include <string> | ||
| #include <sstream> | ||
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| #include "LIEF/visitors/Hash.hpp" | ||
| #include "LIEF/MachO/Relocation.hpp" | ||
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| #include "pyMachO.hpp" | ||
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| template<class T> | ||
| using getter_t = T (Relocation::*)(void) const; | ||
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| template<class T> | ||
| using setter_t = void (Relocation::*)(T); | ||
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| void init_MachO_Relocation_class(py::module& m) { | ||
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| py::class_<Relocation>(m, "Relocation") | ||
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| .def_property("address", | ||
| static_cast<getter_t<uint32_t>>(&Relocation::address), | ||
| static_cast<setter_t<uint32_t>>(&Relocation::address), | ||
| "For :attr:`~lief.MachO.FILE_TYPES.OBJECT` this is an " | ||
| "offset from the start of the " RST_CLASS_REF(lief.MachO.Section) " " | ||
| "to the item containing the address requiring relocation.", | ||
| py::return_value_policy::reference_internal) | ||
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| .def_property("pc_relative", | ||
| static_cast<getter_t<bool>>(&Relocation::is_pc_relative), | ||
| static_cast<setter_t<bool>>(&Relocation::pc_relative), | ||
| "Indicates whether the item containing the address to be " | ||
| "relocated is part of a CPU instruction that uses PC-relative addressing.\n\n" | ||
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| "For addresses contained in PC-relative instructions, the CPU adds the address of " | ||
| "the instruction to the address contained in the instruction.", | ||
| py::return_value_policy::reference_internal) | ||
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| .def_property("size", | ||
| static_cast<getter_t<uint8_t>>(&Relocation::size), | ||
| static_cast<setter_t<uint8_t>>(&Relocation::size), | ||
| "Indicates the length of the item containing the address to be relocated.\n\n" | ||
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| "The following table lists values and the corresponding address length:\n" | ||
| "\t * 0: 1 byte\n" | ||
| "\t * 1: 2 byte\n" | ||
| "\t * 2: 4 byte\n" | ||
| "\t * 3: 4 byte\n", | ||
| py::return_value_policy::reference_internal) | ||
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| .def_property("type", | ||
| static_cast<getter_t<uint8_t>>(&Relocation::type), | ||
| static_cast<setter_t<uint8_t>>(&Relocation::type), | ||
| "Type of the relocation according to the :attr:`~lief.MachO.Relocation.architecture`\n\n" | ||
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| "See:\n" | ||
| "\t * " RST_CLASS_REF(lief.MachO.X86_RELOCATION) "\n" | ||
| "\t * " RST_CLASS_REF(lief.MachO.X86_64_RELOCATION) "\n" | ||
| "\t * " RST_CLASS_REF(lief.MachO.PPC_RELOCATION) "\n" | ||
| "\t * " RST_CLASS_REF(lief.MachO.ARM_RELOCATION) "\n" | ||
| "\t * " RST_CLASS_REF(lief.MachO.ARM64_RELOCATION) "\n", | ||
| py::return_value_policy::reference_internal) | ||
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| .def_property("value", | ||
| static_cast<getter_t<int32_t>>(&Relocation::value), | ||
| static_cast<setter_t<int32_t>>(&Relocation::value), | ||
| "For **scattered** relocations, the address of the relocatable expression " | ||
| "for the item in the file that needs to be updated if the address is changed.\n\n" | ||
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| "For relocatable expressions with the difference of two section addresses, " | ||
| "the address from which to subtract (in mathematical terms, the minuend) " | ||
| "is contained in the first relocation entry and the address to subtract (the subtrahend) " | ||
| "is contained in the second relocation entry.", | ||
| py::return_value_policy::reference_internal) | ||
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| .def_property_readonly("architecture", | ||
| &Relocation::architecture, | ||
| "" RST_CLASS_REF(lief.MachO.CPU_TYPES) " of the relocation") | ||
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| .def_property_readonly("is_scattered", | ||
| &Relocation::is_scattered, | ||
| "``True`` if the relocation is a scattered one") | ||
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| .def_property_readonly("has_symbol", | ||
| &Relocation::has_symbol, | ||
| "``True`` if the relocation has a " RST_CLASS_REF(lief.MachO.Symbol) " associated with") | ||
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| .def_property_readonly("symbol", | ||
| static_cast<Symbol& (Relocation::*)(void)>(&Relocation::symbol), | ||
| "" RST_CLASS_REF(lief.MachO.Symbol) " associated with the relocation (if any)", | ||
| py::return_value_policy::reference) | ||
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| .def_property_readonly("has_section", | ||
| &Relocation::has_section, | ||
| "``True`` if the relocation has a " RST_CLASS_REF(lief.MachO.Section) " associated with") | ||
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| .def_property_readonly("section", | ||
| static_cast<Section& (Relocation::*)(void)>(&Relocation::section), | ||
| "" RST_CLASS_REF(lief.MachO.Section) " associated with the relocation (if any)", | ||
| py::return_value_policy::reference) | ||
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| .def("__eq__", &Relocation::operator==) | ||
| .def("__ne__", &Relocation::operator!=) | ||
| .def("__hash__", | ||
| [] (const Relocation& relocation) { | ||
| return LIEF::Hash::hash(relocation); | ||
| }) | ||
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| .def("__str__", | ||
| [] (const Relocation& relocation) | ||
| { | ||
| std::ostringstream stream; | ||
| stream << relocation; | ||
| std::string str = stream.str(); | ||
| return str; | ||
| }); | ||
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| } |
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