/* Chrysalide - Outil d'analyse de fichiers binaires * targetable.c - prototypes pour l'équivalent Python du fichier "arch/operands/targetable.c" * * Copyright (C) 2020 Cyrille Bagard * * This file is part of Chrysalide. * * Chrysalide 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 3 of the License, or * (at your option) any later version. * * Chrysalide 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "targetable.h" #include #include #include "../processor.h" #include "../vmpa.h" #include "../../access.h" #include "../../helpers.h" #include "../../format/format.h" /* ------------------------ GLUE POUR CREATION DEPUIS PYTHON ------------------------ */ /* Procède à l'initialisation de l'interface pour ciblage. */ static void py_targetable_operand_init(GTargetableOperandIface *, gpointer *); /* Obtient l'adresse de la cible visée par un opérande. */ static bool py_targetable_operand_get_addr_wrapper(const GTargetableOperand *, const vmpa2t *, GBinFormat *, GArchProcessor *, vmpa2t *); /* ------------------------ INTERFACE POUR OPERANDE CIBLABLE ------------------------ */ /* Obtient l'adresse de la cible visée par un opérande. */ static PyObject *py_targetable_operand_get_addr(PyObject *, PyObject *); /* ---------------------------------------------------------------------------------- */ /* GLUE POUR CREATION DEPUIS PYTHON */ /* ---------------------------------------------------------------------------------- */ /****************************************************************************** * * * Paramètres : iface = interface GLib à initialiser. * * unused = adresse non utilisée ici. * * * * Description : Procède à l'initialisation de l'interface pour ciblage. * * * * Retour : - * * * * Remarques : - * * * ******************************************************************************/ static void py_targetable_operand_init(GTargetableOperandIface *iface, gpointer *unused) { #define TARGETABLE_OPERAND_DOC \ "The TargetableOperand interface depicts operands which can drive to" \ " another location.\n" \ "\n" \ "By instance, an immediate value can target a given address into" \ " some function code." \ "\n" \ "A typical class declaration for a new implementation looks like:\n" \ "\n" \ " class NewImplem(GObject.Object, TargetableOperand):\n" \ " ...\n" \ "\n" \ "The following method has to be defined for new implementations:\n" \ "* pychrysalide.arch.operands.RenamedOperand._get_addr();\n" \ iface->get_addr = py_targetable_operand_get_addr_wrapper; } /****************************************************************************** * * * Paramètres : operand = operande à consulter. * * src = localisation de l'instruction mère. * * format = format reconnu pour le binaire chargé. * * proc = architecture associée à ce même binaire. * * addr = localisation de la cible. [OUT] * * * * Description : Obtient l'adresse de la cible visée par un opérande. * * * * Retour : true si la cible est valide, false sinon. * * * * Remarques : - * * * ******************************************************************************/ static bool py_targetable_operand_get_addr_wrapper(const GTargetableOperand *operand, const vmpa2t *src, GBinFormat *format, GArchProcessor *proc, vmpa2t *addr) { bool result; /* Bilan à retourner */ PyGILState_STATE gstate; /* Sauvegarde d'environnement */ PyObject *pyobj; /* Objet Python concerné */ PyObject *args; /* Arguments pour l'appel */ PyObject *pyret; /* Bilan de consultation */ int ret; /* Bilan d'une conversion */ #define TARGETABLE_OPERAND_GET_ADDR_WRAPPER PYTHON_WRAPPER_DEF \ ( \ _get_addr, "$self, src, format, proc", \ METH_VARARGS, \ "Abstract method used to compute a target address from an operand." \ "\n" \ "The *src* argument is the location of the instruction owning the" \ " operand, as a pychrysalide.arch.vmpa instance. The format is a" \ " pychrysalide.format.BinFormat instance, providing all needed" \ " information and the processor is a" \ " pychrysalide.arch.ArchProcessor instance, providing all needed" \ " information too.\n" \ "\n" \ "The result has to be a pychrysalide.arch.vmpa address or None." \ ) result = false; gstate = PyGILState_Ensure(); pyobj = pygobject_new(G_OBJECT(operand)); if (has_python_method(pyobj, "_get_addr")) { args = PyTuple_New(3); PyTuple_SetItem(args, 0, build_from_internal_vmpa(src)); PyTuple_SetItem(args, 1, pygobject_new(G_OBJECT(format))); PyTuple_SetItem(args, 2, pygobject_new(G_OBJECT(proc))); pyret = run_python_method(pyobj, "_get_addr", NULL); if (pyret != NULL) { ret = convert_any_to_vmpa(pyret, addr); result = (ret == 1); PyErr_Clear(); Py_DECREF(pyret); } Py_DECREF(args); } Py_DECREF(pyobj); PyGILState_Release(gstate); return result; } /* ---------------------------------------------------------------------------------- */ /* INTERFACE POUR OPERANDE CIBLABLE */ /* ---------------------------------------------------------------------------------- */ /****************************************************************************** * * * Paramètres : self = contenu binaire à manipuler. * * args = arguments accompagnant l'appel. * * * * Description : Obtient l'adresse de la cible visée par un opérande. * * * * Retour : Localisation de la cible ou None. * * * * Remarques : - * * * ******************************************************************************/ static PyObject *py_targetable_operand_get_addr(PyObject *self, PyObject *args) { PyObject *result; /* Instance à retourner */ vmpa2t *src; /* Version native d'adresse */ GBinFormat *format; /* Instance GLib du format */ GArchProcessor *proc; /* Instance GLib de l'archi. */ int ret; /* Bilan de lecture des args. */ GTargetableOperand *operand; /* Instance à manipuler */ vmpa2t addr; /* Localisation à cibler */ bool defined; /* Cible définie ? */ #define TARGETABLE_OPERAND_GET_ADDR_METHOD PYTHON_METHOD_DEF \ ( \ get_addr, "$self, src, format, proc", \ METH_VARARGS, py_targetable_operand, \ "Compute a target address from an operand." \ "\n" \ "The following arguments are required:\n" \ "* src is the location of the instruction owning the operand, as a" \ " pychrysalide.arch.vmpa instance.\n" \ "* format is a pychrysalide.format.BinFormat instance, providing" \ " all needed information.\n" \ "* proc is a pychrysalide.arch.ArchProcessor instance, providing" \ " all needed information too.\n" \ "\n" \ "The result is a pychrysalide.arch.vmpa address or None." \ ) ret = PyArg_ParseTuple(args, "O&O&O&", convert_any_to_vmpa, &src, convert_to_binary_format, &format, convert_to_arch_processor, &proc); if (!ret) return NULL; operand = G_TARGETABLE_OPERAND(pygobject_get(self)); defined = g_targetable_operand_get_addr(operand, src, format, proc, &addr); if (defined) result = build_from_internal_vmpa(&addr); else { result = Py_None; Py_INCREF(result); } clean_vmpa_arg(src); return result; } /****************************************************************************** * * * Paramètres : - * * * * Description : Fournit un accès à une définition de type à diffuser. * * * * Retour : Définition d'objet pour Python. * * * * Remarques : - * * * ******************************************************************************/ PyTypeObject *get_python_targetable_operand_type(void) { static PyMethodDef py_targetable_operand_methods[] = { TARGETABLE_OPERAND_GET_ADDR_WRAPPER, TARGETABLE_OPERAND_GET_ADDR_METHOD, { NULL } }; static PyGetSetDef py_targetable_operand_getseters[] = { { NULL } }; static PyTypeObject py_targetable_operand_type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "pychrysalide.arch.operands.TargetableOperand", .tp_basicsize = sizeof(PyObject), .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, .tp_doc = TARGETABLE_OPERAND_DOC, .tp_methods = py_targetable_operand_methods, .tp_getset = py_targetable_operand_getseters }; return &py_targetable_operand_type; } /****************************************************************************** * * * Paramètres : module = module dont la définition est à compléter. * * * * Description : Prend en charge l'objet 'pychrysalide.....TargetableOperand'.* * * * Retour : Bilan de l'opération. * * * * Remarques : - * * * ******************************************************************************/ bool ensure_python_targetable_operand_is_registered(void) { PyTypeObject *type; /* Type 'TargetableOperand' */ PyObject *module; /* Module à recompléter */ PyObject *dict; /* Dictionnaire du module */ static GInterfaceInfo info = { /* Paramètres d'inscription */ .interface_init = (GInterfaceInitFunc)py_targetable_operand_init, .interface_finalize = NULL, .interface_data = NULL, }; type = get_python_targetable_operand_type(); if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) { module = get_access_to_python_module("pychrysalide.arch.operands"); dict = PyModule_GetDict(module); if (!register_interface_for_pygobject(dict, G_TYPE_TARGETABLE_OPERAND, type, &info)) return false; } return true; } /****************************************************************************** * * * Paramètres : arg = argument quelconque à tenter de convertir. * * dst = destination des valeurs récupérées en cas de succès. * * * * Description : Tente de convertir en opérande ciblable. * * * * Retour : Bilan de l'opération, voire indications supplémentaires. * * * * Remarques : - * * * ******************************************************************************/ int convert_to_targetable_operand(PyObject *arg, void *dst) { int result; /* Bilan à retourner */ result = PyObject_IsInstance(arg, (PyObject *)get_python_targetable_operand_type()); switch (result) { case -1: /* L'exception est déjà fixée par Python */ result = 0; break; case 0: PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to targetable operand"); break; case 1: *((GTargetableOperand **)dst) = G_TARGETABLE_OPERAND(pygobject_get(arg)); break; default: assert(false); break; } return result; }