summaryrefslogtreecommitdiff
path: root/src/analysis/disass/disassembler.c
blob: e7c972dc4b4505d2fb545e17b940c66cd0f6a841 (plain)
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416

/* OpenIDA - Outil d'analyse de fichiers binaires
 * disassembler.c - encadrement des phases de désassemblage
 *
 * Copyright (C) 2010-2012 Cyrille Bagard
 *
 *  This file is part of OpenIDA.
 *
 *  OpenIDA 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.
 *
 *  OpenIDA 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "disassembler.h"


#include <malloc.h>
#include <stdio.h>
#include <string.h>


#include <i18n.h>


#include "fetch.h"
#include "limit.h"
#include "links.h"
#include "macro.h"
#include "output.h"
#include "../../decomp/lang/asm.h"
#include "../../format/format.h"
#include "../../glibext/delayed-int.h"
#include "../../gui/panels/log.h"
#include "../../plugins/pglist.h"



/* ------------------------ DESASSEMBLAGE DE BINAIRE DIFFERE ------------------------ */


/* Ensembles binaires à désassembler (instance) */
struct _GDelayedDisassembly
{
    GDelayedWork parent;                    /* A laisser en premier        */

    GLoadedBinary *binary;                  /* Destinataire final          */
    GExeFormat *format;                     /* Format du binaire représenté*/

    GBinPart **parts;                       /* Parties binaires à traiter  */
    size_t count;                           /* Nombre de ces parties       */

    GArchInstruction **instrs;              /* Instructions résultantes    */
    GCodeBuffer *buffer;                    /* Tampon pour le rendu        */

};

/* Ensembles binaires à désassembler (classe) */
struct _GDelayedDisassemblyClass
{
    GDelayedWorkClass parent;               /* A laisser en premier        */

};


/* Initialise la classe des tâches de désassemblage différé. */
static void g_delayed_disassembly_class_init(GDelayedDisassemblyClass *);

/* Initialise une tâche de désassemblage différé. */
static void g_delayed_disassembly_init(GDelayedDisassembly *);

/* Crée une tâche de désassemblage différé. */
static GDelayedDisassembly *g_delayed_disassembly_new(GLoadedBinary *, GBinPart **, size_t, GArchInstruction **, GCodeBuffer *);

/* Assure le désassemblage en différé. */
static void g_delayed_disassembly_process(GDelayedDisassembly *, GtkExtStatusBar *);



/* -------------------------- GESTION GLOBALE DE PROCEDURE -------------------------- */


/* Construit la description d'introduction du désassemblage. */
static void build_disass_prologue(GCodeBuffer *, const char *, const uint8_t *, off_t);



/* ---------------------------------------------------------------------------------- */
/*                          DESASSEMBLAGE DE BINAIRE DIFFERE                          */
/* ---------------------------------------------------------------------------------- */


/* Indique le type défini pour les tâches de désassemblage différé. */
G_DEFINE_TYPE(GDelayedDisassembly, g_delayed_disassembly, G_TYPE_DELAYED_WORK);


/******************************************************************************
*                                                                             *
*  Paramètres  : klass = classe à initialiser.                                *
*                                                                             *
*  Description : Initialise la classe des tâches de désassemblage différé.    *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void g_delayed_disassembly_class_init(GDelayedDisassemblyClass *klass)
{

}


/******************************************************************************
*                                                                             *
*  Paramètres  : disass = instance à initialiser.                             *
*                                                                             *
*  Description : Initialise une tâche de désassemblage différé.               *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void g_delayed_disassembly_init(GDelayedDisassembly *disass)
{
    G_DELAYED_WORK(disass)->run = (run_task_fc)g_delayed_disassembly_process;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : binary = binaire chargé en attente des résultats.            *
*                format = format du binaire représenté.                       *
*                parts  = parties binaires à désassembler.                    *
*                count  = nombre de parties à traiter.                        *
*                instrs = emplacement pour la liste d'instructions.           *
*                buffer = tampon de sortie pour les instructions.             *
*                                                                             *
*  Description : Crée une tâche de désassemblage différé.                     *
*                                                                             *
*  Retour      : Tâche créée.                                                 *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static GDelayedDisassembly *g_delayed_disassembly_new(GLoadedBinary *binary, GBinPart **parts, size_t count, GArchInstruction **instrs, GCodeBuffer *buffer)
{
    GDelayedDisassembly *result;            /* Tâche à retourner           */

    result = g_object_new(G_TYPE_DELAYED_DISASSEMBLY, NULL);

    result->binary = binary;
    result->format = g_loaded_binary_get_format(binary);

    result->parts = parts;
    result->count = count;

    result->instrs = instrs;
    result->buffer = buffer;

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : disass    = analyse à mener.                                 *
*                statusbar = barre de statut à tenir informée.                *
*                                                                             *
*  Description : Assure le désassemblage en différé.                          *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void g_delayed_disassembly_process(GDelayedDisassembly *disass, GtkExtStatusBar *statusbar)
{
#ifdef DEBUG
    unsigned int valid;                     /* Instructions traduites      */
    unsigned int db;                        /* Instructions non décodées   */
    unsigned int valid_sum;                 /* Instructions traduites      */
    unsigned int instr_sum;                 /* Instructions totales        */
    size_t i;                               /* Boucle de parcours          */
#endif
    GBinRoutine **routines;                 /* Liste des routines trouvées */
    size_t routines_count;                  /* Nombre de ces routines      */
    guint id;                               /* Identifiant de statut       */

    routines = g_binary_format_get_routines(G_BIN_FORMAT(disass->format), &routines_count);

    /* Première étape */

    id = gtk_extended_status_bar_push(statusbar, _("Disassembling..."), true);

    *disass->instrs = disassemble_binary_parts(disass->binary, disass->parts, disass->count,
                                               statusbar, id);

    gtk_extended_status_bar_remove(statusbar, id);

#ifdef DEBUG

    valid_sum = 0;
    instr_sum = 0;

    for (i = 0; i < disass->count; i++)
    {
        g_binary_part_get_checkup(disass->parts[i], &valid, &db);
        valid_sum += valid;
        instr_sum += (valid + db);
    }

    log_variadic_message(LMT_WARNING, _("Disassembled instructions : %u %% (%u / %d)"),
                         (valid_sum * 100) / instr_sum,
                         valid_sum, instr_sum);

#endif

    run_plugins_on_binary(disass->binary, PGA_BINARY_DISASSEMBLED, true);

    /* Seconde étape */

    id = gtk_extended_status_bar_push(statusbar, _("Establishing links..."), true);

    establish_links_between_lines(*disass->instrs, routines, routines_count, statusbar, id);

    gtk_extended_status_bar_remove(statusbar, id);

    run_plugins_on_binary(disass->binary, PGA_BINARY_LINKED, true);

    /* Troisième  étape */

    id = gtk_extended_status_bar_push(statusbar, _("Finding remaining limits..."), true);

    qsort(routines, routines_count, sizeof(GBinRoutine *), (__compar_fn_t)g_binary_routine_rcompare);

    limit_all_routines(*disass->instrs, routines, routines_count, statusbar, id);

    gtk_extended_status_bar_remove(statusbar, id);

    run_plugins_on_binary(disass->binary, PGA_BINARY_BOUNDED, true);

    /* Quatrième étape */

    id = gtk_extended_status_bar_push(statusbar, _("Grouping routines instructions..."), true);

    qsort(routines, routines_count, sizeof(GBinRoutine *), (__compar_fn_t)g_binary_routine_rcompare);

    group_routines_instructions(*disass->instrs, routines, routines_count, statusbar, id);

    gtk_extended_status_bar_remove(statusbar, id);

    run_plugins_on_binary(disass->binary, PGA_BINARY_GROUPED, true);

    /* Cinquième étape */

    id = gtk_extended_status_bar_push(statusbar, _("Printing disassembled code..."), true);

    qsort(routines, routines_count, sizeof(GBinRoutine *), (__compar_fn_t)g_binary_routine_compare);

    print_disassembled_instructions(disass->buffer, disass->format, *disass->instrs,
                                    routines, routines_count, statusbar, id);

    gtk_extended_status_bar_remove(statusbar, id);

    run_plugins_on_binary(disass->binary, PGA_BINARY_PRINTED, true);

}



/* ---------------------------------------------------------------------------------- */
/*                            GESTION GLOBALE DE PROCEDURE                            */
/* ---------------------------------------------------------------------------------- */


/******************************************************************************
*                                                                             *
*  Paramètres  : buffer   = tampon de destination pour le texte.              *
*                filename = nom du fichier ciblé à décompiler.                *
*                data     = données en mémoire pour l'empreinte.              *
*                length   = quantité de données à prendre en compte.          *
*                                                                             *
*  Description : Construit la description d'introduction du désassemblage.    *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void build_disass_prologue(GCodeBuffer *buffer, const char *filename, const uint8_t *data, off_t length)
{
    GLangOutput *output;                    /* Modèle de sortie adéquat    */
    GBufferLine *line;                      /* Ligne de destination        */
    size_t len;                             /* Taille du texte             */
    char *content;                          /* Contenu textuel d'une ligne */
    GChecksum *checksum;                    /* Calcul de l'empreinte       */
    const gchar *hex;                       /* Valeur hexadécimale du SHA  */

    output = g_asm_output_new();

    line = g_lang_output_start_comments(output, buffer);
    if (line != NULL) g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    /* Introduction */

    line = g_lang_output_continue_comments(output, buffer,
                                           SL(_("Disassembly generated by Chrysalide")));
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    line = g_lang_output_continue_comments(output, buffer,
                                           SL(_("Chrysalide is free software - © 2008-2012 Cyrille Bagard")));
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    line = g_lang_output_continue_comments(output, buffer, NULL, 0);
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    /* Fichier */

    len = strlen(_("File: ")) + strlen(filename) + 1;
    content = (char *)calloc(len, sizeof(char));

    snprintf(content, len, "%s%s", _("File: "), filename);

    line = g_lang_output_continue_comments(output, buffer, content, len - 1);
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    free(content);

    /* Checksum SHA256 */

    checksum = g_checksum_new(G_CHECKSUM_SHA256);

    g_checksum_update(checksum, data, length);
    hex = g_checksum_get_string(checksum);

    len = strlen(_("Sha256: ")) + strlen(hex);
    content = (char *)calloc(len + 1, sizeof(char));

    snprintf(content, len + 1, "%s%s", _("Sha256: "), hex);

    g_checksum_free(checksum);

    line = g_lang_output_continue_comments(output, buffer, content, len - 1);
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    free(content);

    /* Ligne de séparation */

    line = g_lang_output_continue_comments(output, buffer, NULL, 0);
    g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    /* Conclusion */

    line = g_lang_output_end_comments(output, buffer);
    if (line != NULL) g_buffer_line_start_merge_at(line, BLC_ADDRESS);

    g_object_unref(G_OBJECT(output));

}


/******************************************************************************
*                                                                             *
*  Paramètres  : binary = représentation de binaire chargé.                   *
*                parts  = parties binaires à désassembler.                    *
*                count  = nombre de parties à traiter.                        *
*                instrs = liste des instructions chargées. [OUT]              *
*                buffer = tampon de code mis en place. [OUT]                  *
*                ack    = fonction à appeler une fois l'opération terminée.   *
*                                                                             *
*  Description : Procède au désassemblage d'un contenu binaire donné.         *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

void disassemble_binary(GLoadedBinary *binary, GBinPart **parts, size_t parts_count, GArchInstruction **instrs, GCodeBuffer **buffer, disassembly_ack_fc ack)
{
    const uint8_t *data;                    /* Données binaires brutes     */
    off_t length;                           /* Quantité de ces données     */
    GDelayedDisassembly *disass;            /* Désassemblage à mener       */
    GWorkQueue *queue;                      /* Gestionnaire de différés    */

    *buffer = g_code_buffer_new();

    data = g_loaded_binary_get_data(binary, &length);
    build_disass_prologue(*buffer, g_loaded_binary_get_filename(binary, true), data, length);

    disass = g_delayed_disassembly_new(binary, parts, parts_count, instrs, *buffer);
    g_signal_connect(disass, "work-completed", G_CALLBACK(ack), binary);

    queue = get_work_queue();
    g_work_queue_schedule_work(queue, G_DELAYED_WORK(disass));

}