Supported the Java Class file format.

git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@46 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a

1 files changed, 354 insertions, 0 deletions

diff --git a/src/format/java/pool.c b/src/format/java/pool.c
new file mode 100755
index 0000000..f735819
--- /dev/null
+++ b/src/format/java/pool.c
@@ -0,0 +1,354 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * pool.c - lecture du réservoir de constantes
+ *
+ * Copyright (C) 2008 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 "pool.h"
+
+
+#include <malloc.h>
+#include <math.h>
+#include <string.h>
+
+#include "java-int.h"
+#include "../../common/endianness.h"
+
+
+
+/* Charge les propriétés d'une constante du réservoir. */
+bool load_java_pool_entry(java_format *, constant_pool_entry *, off_t *);
+
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : format = description de l'exécutable à compléter.            *
+*                pos    = point de lecture à faire évoluer. [OUT]             *
+*                                                                             *
+*  Description : Charge le réservoir de constantes d'un binaire Java.         *
+*                                                                             *
+*  Retour      : true si l'opération s'est bien déroulée, false sinon.        *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool load_java_pool(java_format *format, off_t *pos)
+{
+    bool result;                            /* Bilan à remonter            */
+    uint16_t count;                         /* Nombre d'éléments présents  */
+    uint16_t i;                             /* Boucle de parcours          */
+
+    result = read_u16(&count, EXE_FORMAT(format)->content, pos,
+                      EXE_FORMAT(format)->length, SRE_BIG);
+
+    format->pool_len = count - 1;
+    format->pool = (constant_pool_entry *)calloc(count - 1, sizeof(constant_pool_entry));
+
+    for (i = 1; i < count && result; i++)
+    {
+        result = load_java_pool_entry(format, &format->pool[i - 1], pos);
+
+        if (format->pool[i - 1].tag == CONSTANT_LONG
+            || format->pool[i - 1].tag == CONSTANT_DOUBLE)
+        {
+            i++;
+
+            /* On n'est jamais trop prudent */
+            if (i < count)
+                format->pool[i - 1].tag = CONSTANT_EMPTY;
+
+        }
+
+    }
+
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : format = description de l'exécutable à vider.                *
+*                                                                             *
+*  Description : Décharge le réservoir de constantes d'un binaire Java.       *
+*                                                                             *
+*  Retour      : -                                                            *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+void unload_java_pool(java_format *format)
+{
+    uint16_t i;                             /* Boucle de parcours          */
+
+    for (i = 0; i < format->pool_len; i++)
+        switch (format->pool[i].tag)
+        {
+            case CONSTANT_EMPTY:
+            case CONSTANT_CLASS:
+            case CONSTANT_FIELD_REF:
+            case CONSTANT_METHOD_REF:
+            case CONSTANT_INTERFACE_METHOD_REF:
+            case CONSTANT_STRING:
+            case CONSTANT_INTEGER:
+            case CONSTANT_FLOAT:
+            case CONSTANT_LONG:
+            case CONSTANT_DOUBLE:
+            case CONSTANT_NAME_AND_TYPE:
+                break;
+
+            case CONSTANT_UTF8:
+                free(format->pool[i].info.utf8.bytes);
+                break;
+
+        }
+
+    free(format->pool);
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : format = description de l'exécutable à compléter.            *
+*                entry  = élément à spécifier. [OUT]                          *
+*                pos    = point de lecture à faire évoluer. [OUT]             *
+*                                                                             *
+*  Description : Charge les propriétés d'une constante du réservoir.          *
+*                                                                             *
+*  Retour      : true si l'opération s'est bien déroulée, false sinon.        *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool load_java_pool_entry(java_format *format, constant_pool_entry *entry, off_t *pos)
+{
+    bool result;                            /* Bilan à retourner           */
+    uint8_t tag;                            /* Type de l'élément           */
+    uint32_t low_bytes;                     /* Octets de poids faible      */
+    uint32_t high_bytes;                    /* Octets de poids fort        */
+    uint64_t bits;                          /* Nombre lu sur 64 bits       */
+    int sign;                               /* Signe du nombre lu          */
+	int exponent;                           /* Exposant du nombre lu       */
+	uint64_t mantissa32;                    /* Mantisse du nombre lu 32b   */
+	uint64_t mantissa64;                    /* Mantisse du nombre lu 64b   */
+    uint16_t length;                        /* Taille d'une chaîne         */
+
+    result = read_u8(&tag, EXE_FORMAT(format)->content, pos,
+                     EXE_FORMAT(format)->length, SRE_BIG);
+
+    entry->tag = tag;
+
+    switch (entry->tag)
+    {
+        case CONSTANT_CLASS:
+            result = read_u16(&entry->info.class.name_index, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            break;
+
+        case CONSTANT_FIELD_REF:
+        case CONSTANT_METHOD_REF:
+        case CONSTANT_INTERFACE_METHOD_REF:
+
+            result = read_u16(&entry->info.ref.class_index, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            result &= read_u16(&entry->info.ref.name_and_type_index, EXE_FORMAT(format)->content,
+                               pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            break;
+
+        case CONSTANT_STRING:
+            result = read_u16(&entry->info.string.string_index, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            break;
+
+        case CONSTANT_INTEGER:
+            result = read_u32(&entry->info.int_val.val, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            break;
+
+        case CONSTANT_FLOAT:
+
+            result = read_u32(&low_bytes, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            if (result)
+            {
+                if (low_bytes == 0x7f800000)
+                    entry->info.float_val.val = INFINITY;
+
+                else if (low_bytes == 0xff800000)
+                    entry->info.float_val.val = /* -1* */INFINITY;
+
+                else if ((low_bytes >= 0x7f800001 && low_bytes <= 0x7fffffff)
+                         || (low_bytes >= 0xff800001 && low_bytes <= 0xffffffff))
+                    entry->info.float_val.val = NAN;
+
+                else if (low_bytes == 0x00000000 || low_bytes == 0x80000000)
+                    entry->info.float_val.val = 0;
+
+                else
+                {
+                    sign = (low_bytes & 0x80000000) ? -1 : 1;
+                    exponent = (low_bytes >> 23) & 0xff;
+                    mantissa32 = (exponent == 0 ?
+                                  (low_bytes & 0x7fffff) << 1 :
+                                  (low_bytes & 0x7fffff) | 0x800000);
+
+                    entry->info.float_val.val = pow(2, (exponent - 150));
+                    entry->info.float_val.val *= mantissa32;
+                    entry->info.float_val.val *= sign;
+
+                }
+
+            }
+
+            break;
+
+        case CONSTANT_LONG:
+
+            result = read_u32(&high_bytes, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            result &= read_u32(&low_bytes, EXE_FORMAT(format)->content,
+                               pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            if (result)
+            {
+                entry->info.double_val.val = (uint64_t)high_bytes << 32;
+                entry->info.double_val.val += low_bytes;
+            }
+
+            break;
+
+        case CONSTANT_DOUBLE:
+
+            result = read_u32(&high_bytes, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            result &= read_u32(&low_bytes, EXE_FORMAT(format)->content,
+                               pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            if (result)
+            {
+                bits = (uint64_t)high_bytes << 32 | (uint64_t)low_bytes;
+
+                if (bits == 0x7ff0000000000000ll)
+                    entry->info.double_val.val = INFINITY;
+
+                else if (bits == 0xfff0000000000000ll)
+                    entry->info.double_val.val = /* -1* */INFINITY;
+
+                else if ((bits >= 0x7ff0000000000001ll && bits <= 0x7fffffffffffffffll)
+                         || (bits >= 0xfff0000000000001ll && bits <= 0xffffffffffffffffll))
+                    entry->info.double_val.val = NAN;
+
+                else if (bits == 0x0000000000000000ll || bits == 0x8000000000000000ll)
+                    entry->info.double_val.val = 0;
+
+                else
+                {
+                    sign = ((bits >> 63) == 0) ? 1 : -1;
+                    exponent = (bits >> 52) & 0x7ffl;
+                    mantissa64 = (exponent == 0 ?
+                                  (bits & 0xfffffffffffffll) << 1 :
+                                  (bits & 0xfffffffffffffll) | 0x10000000000000ll);
+
+                    entry->info.double_val.val = pow(2, (exponent - 1075));
+                    entry->info.double_val.val *= mantissa64;
+                    entry->info.double_val.val *= sign;
+
+                }
+
+            }
+
+            break;
+
+        case CONSTANT_NAME_AND_TYPE:
+
+            result = read_u16(&entry->info.name_type.name_index, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+            result &= read_u16(&entry->info.name_type.descriptor_index, EXE_FORMAT(format)->content,
+                               pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            break;
+
+        case CONSTANT_UTF8:
+
+            result = read_u16(&length, EXE_FORMAT(format)->content,
+                              pos, EXE_FORMAT(format)->length, SRE_BIG);
+
+            if (result)
+            {
+                entry->info.utf8.bytes = (char *)calloc(length + 1, sizeof(char));
+                memcpy(entry->info.utf8.bytes, &EXE_FORMAT(format)->content[*pos], length);
+                *pos += length;
+            }
+
+            break;
+
+        default:
+            result = false;
+            break;
+
+    }
+
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : format = description de l'exécutable à compléter.            *
+*                index  = indice de l'élément dont la valeur est à recupérer. *
+*                str    = adresse où placer la chaîne de caractères trouvée.  *
+*                                                                             *
+*  Description : Recherche une chaîne de caractères dans le réservoir.        *
+*                                                                             *
+*  Retour      : true si l'opération s'est bien déroulée, false sinon.        *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool get_java_pool_ut8_string(java_format *format, uint16_t index, const char **str)
+{
+    bool result;                            /* Bilan à renvoyer            */
+    constant_pool_entry *entry;             /* Entrée du réservoir visée   */
+
+    result = (index <= format->pool_len);
+
+    if (result)
+    {
+        entry = &format->pool[index - 1];
+
+        result = (entry->tag == CONSTANT_UTF8);
+
+        if (result)
+            (*str) = entry->info.utf8.bytes;
+
+    }
+
+    return result;
+
+}