diff options
Diffstat (limited to 'plugins/govm/goas.c')
| -rw-r--r-- | plugins/govm/goas.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/plugins/govm/goas.c b/plugins/govm/goas.c new file mode 100644 index 0000000..443d0d5 --- /dev/null +++ b/plugins/govm/goas.c @@ -0,0 +1,266 @@ + +/* OpenIDA - Outil d'analyse de fichiers binaires + * main.c - fichier d'entrée du programme + * + * Copyright (C) 2009 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include <fcntl.h> +#include <getopt.h> +#include <libgen.h> +#include <malloc.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + + +#include "build.h" + + +/* gram.y : Procède à l'assemblage d'une ligne de code. */ +bool process_govm_code(govm_info *, const char *); + + +/* Affiche une description des appels au programme possibles. */ +static void show_usage(char *); + +/* Lit le fichier d'entrée ligne par ligne et l'assemble. */ +static bool feed_govm_parser(const char *, govm_info *); + + + +/****************************************************************************** +* * +* Paramètres : name = nom du programme lancé. * +* * +* Description : Affiche une description des appels au programme possibles. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void show_usage(char *name) +{ + fprintf(stderr, "Usage: %s [--help] [--warn] [--output filename] [--big] [--data number] input\n", basename(name)); + + fprintf(stderr, "\n"); + + fprintf(stderr, "\t--help\t\t\tDisplay this help message.\n"); + + fprintf(stderr, "\n"); + + fprintf(stderr, "\t--warn\t\t\tDisplay warnings during the compilation.\n"); + fprintf(stderr, "\t--output filename\tDefine the output filename (a.out by default).\n"); + fprintf(stderr, "\t--big\t\t\tProduce big endian bytecode.\n"); + fprintf(stderr, "\t--data number\t\tSet the minimal data section size.\n"); + + fprintf(stderr, "\n"); + + fprintf(stderr, "\tinput\t\t\tFile containing the assembly code to compile.\n"); + + fprintf(stderr, "\n"); + +} + + +/****************************************************************************** +* * +* Paramètres : filename = chemin contenant le code à assembler. * +* info = informations tirées du contenu. * +* * +* Description : Lit le fichier d'entrée ligne par ligne et l'assemble. * +* * +* Retour : Bilan de l'opération : true en cas de succès, false sinon. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool feed_govm_parser(const char *filename, govm_info *info) +{ + bool result; /* Résultat à retourner */ + int ret; /* Bilan d'un appel */ + struct stat finfo; /* Recueil des infos. fichier */ + char *buffer; /* Destination de lecture */ + FILE *stream; /* Flux d'entrée */ + size_t pos; /* Position du retour chariot */ + + result = true; + + ret = stat(filename, &finfo); + if (ret == -1) + { + perror("stat"); + return false; + } + + buffer = (char *)calloc(finfo.st_size + 1, sizeof(char)); + if (buffer == NULL) + { + perror("calloc"); + return false; + } + + stream = fopen(filename, "r"); + if (stream == NULL) + { + perror("fopen"); + result = false; + goto fgp_exit; + } + + while (result && fgets(buffer, finfo.st_size + 1, stream) != NULL) + { + pos = strlen(buffer); + + if (pos > 0 && buffer[pos - 1] == '\n') + buffer[pos - 1] = '\0'; + + result = process_govm_code(info, buffer); + + } + + fclose(stream); + + fgp_exit: + + free(buffer); + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : argc = nombre d'arguments dans la ligne de commande. * +* argv = arguments de la ligne de commande. * +* * +* Description : Point d'entrée du programme. * +* * +* Retour : EXIT_SUCCESS si le prgm s'est déroulé sans encombres. * +* * +* Remarques : - * +* * +******************************************************************************/ + +int main(int argc, char **argv) +{ + int result; /* Statut en sortie */ + bool help; /* Affichage de l'aide */ + bool warn; /* Affichage d'avertissements */ + char *output; /* Fichier de sortie */ + bool big; /* Mode gros boutiste */ + uint16_t data; /* Taille min. des données */ + int option_index; /* Indice de l'argument */ + int ret; /* Bilan d'un appel */ + govm_info *info; /* Informations de construct° */ + int fd; /* Flux ouvert en écriture */ + + static struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "warn", no_argument, NULL, 'w' }, + { "output", required_argument, NULL, 'o' }, + { "big", no_argument, NULL, 'b' }, + { "data", required_argument, NULL, 'd' }, + { NULL, 0, NULL, 0 } + }; + + result = EXIT_SUCCESS; + + help = false; + warn = false; + output = "a.out"; + big = false; + data = 0; + + while (1) + { + ret = getopt_long(argc, argv, "hwo:bd:", long_options, &option_index); + if (ret == -1) break; + + switch (ret) + { + case 'h': + help = true; + break; + + case 'w': + warn = true; + break; + + case 'o': + output = optarg; + break; + + case 'b': + big = true; + break; + + case 'd': + data = atoi(optarg); + break; + + } + + } + + if (help || optind == argc) + { + show_usage(argv[0]); + return help ? EXIT_SUCCESS : EXIT_FAILURE; + } + + info = create_govm_info(!big, warn); + + if (!feed_govm_parser(argv[optind], info)) + { + result = EXIT_FAILURE; + goto error_parsing; + } + + fd = open(output, O_WRONLY | O_TRUNC | O_CREAT, 0666); + if (fd == -1) + { + perror("open"); + result = EXIT_FAILURE; + goto error_parsing; + } + + if (!write_govm_info(info, fd)) + { + result = EXIT_FAILURE; + goto error_writing; + } + + error_writing: + + close(fd); + + error_parsing: + + delete_govm_info(info); + + return result; + +} |