BuFile* buFileOpen(const char* path, bool preload, int offset) { iovecStreamParams p = {path, preload, offset}; // set default target; without a default target some logic inside bfd goes horribly wrong bfd_set_default_target("binary"); // open file std::unique_ptr<bfd, bfd_boolean (*)(bfd*)> abfd(bfd_openr_iovec(path, 0, iovecOpen, &p, iovecRead, iovecClose, iovecStat), bfd_close); if (!abfd) return 0; // we should be working with an object file now if (!checkFormat(abfd.get(), bfd_object)) return 0; // decompress sections (we don't know if we'll need it) abfd->flags |= BFD_DECOMPRESS; // slurp symtab since all operations need it anyway std::vector<asymbol*> symtab = slurpSymtab(abfd.get()); std::vector<asymbol*> dyntab = slurpDynamicSymtab(abfd.get()); symtab.insert(symtab.end(), dyntab.begin(), dyntab.end()); symtab.push_back(0); return new BuFile(std::move(abfd), std::move(symtab)); }
/* initialize bincode */ bincode_t *initialize_bincode(const char *file) { bfd *abfd; bincode_t *bin; //char *target = "x86_64-unknown-linux-gnu"; char *target = "i686-pc-linux-gnu"; bfd_init(); if (!bfd_set_default_target(target)) { bs_dbgmsg(" (!) bfd_set_default_target()\n"); return NULL; } if ((abfd = bfd_openr(file, target)) == NULL) { bs_dbgmsg(" (!) bfd_openr(): %s\n", file); return NULL; } if (!bfd_check_format(abfd, bfd_object)) { bs_dbgmsg(" (!) bfd_check_format()\n"); bfd_close(abfd); return NULL; } if((bin = malloc(sizeof(bincode_t))) == NULL) { bs_errmsg(" (!) malloc(): bin\n"); exit(EXIT_FAILURE); } bin->filename = strdup(abfd->filename); bin->abfd = abfd; bin->filesize = bfd_get_size(abfd); bin->start_addr = bfd_get_start_address(abfd); init_disasm_info(bin->abfd, &bin->disasm_info); bin->disasm_info.application_data = bin; initialize_section(bin); return bin; }
bfd * initialize_bfd(const char *filename) { bfd * abfd; char **matching; char *target = "i686-pc-linux-gnu"; bfd_init(); if(!bfd_set_default_target(target)) fatal("program::initialize", "couldn't set default bfd target"); abfd = bfd_openr(filename, target); if(abfd == NULL) fatal("initialize_bfd", "cannot open %s", filename); if (bfd_check_format (abfd, bfd_archive)) fatal("initalize_bfd", "archive files not supported\n"); if(!bfd_check_format_matches(abfd, bfd_object, &matching)) fatal("initialize_bfd", "bfd_check_format_matches failed"); return abfd; }
bool ElfFile::readExports() { long storage_needed; asymbol **symbol_table; long number_of_symbols; long i; m_symbols.clear(); bfd_set_default_target("bfd_target_elf_flavour"); m_bfd = bfd_openr(m_name.toStdString().c_str(),NULL); if(!bfd_check_format(m_bfd,bfd_object)) { return false; } storage_needed = bfd_get_symtab_upper_bound(m_bfd); symbol_table = (asymbol **)malloc(storage_needed); number_of_symbols = bfd_canonicalize_symtab(m_bfd, symbol_table); qDebug() << "Number of symbols " << number_of_symbols; for(i = 0; i < number_of_symbols; i++) { m_symbols << SymbolDescription( symbol_table[i]->section->name, symbol_table[i]->name, symbol_table[i]->flags, symbol_table[i]->value); qDebug() << "found " << symbol_table[i]->name; } free(symbol_table); symbol_table = NULL; return true; }
static bfd * initialize_bfd(const char *filename) { bfd * abfd; char **matching; char *target = "i686-pc-linux-gnu"; bfd_init(); if(!bfd_set_default_target(target)) { fprintf(stderr, "initialize_bfd: couldn't set default bfd target\n"); return NULL; } abfd = bfd_openr(filename, target); if(abfd == NULL) { fprintf(stderr, "initialize_bfd: cannot open %s\n", filename); return NULL; } if (bfd_check_format (abfd, bfd_archive)) { fprintf(stderr, "initalize_bfd: archive files not supported\n"); bfd_close_all_done(abfd); return NULL; } /* if(!bfd_check_format_matches(abfd, bfd_object, &matching)) { */ if( (!bfd_check_format_matches(abfd, bfd_object, &matching)) && (!bfd_check_format_matches(abfd, bfd_core, &matching)) ) { fprintf(stderr, "initialize_bfd: bfd_check_format_matches failed\n"); bfd_close_all_done(abfd); return NULL; } return abfd; }
int main (int argc, char **argv) { char *emulation; long start_time = get_run_time (); #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); #endif #if defined (HAVE_SETLOCALE) setlocale (LC_CTYPE, ""); #endif bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); program_name = argv[0]; xmalloc_set_program_name (program_name); START_PROGRESS (program_name, 0); expandargv (&argc, &argv); bfd_init (); bfd_set_error_program_name (program_name); xatexit (ld_cleanup); /* Set up the sysroot directory. */ ld_sysroot = get_sysroot (argc, argv); if (*ld_sysroot) { if (*TARGET_SYSTEM_ROOT == 0) { einfo ("%P%F: this linker was not configured to use sysroots\n"); ld_sysroot = ""; } else ld_canon_sysroot = lrealpath (ld_sysroot); } if (ld_canon_sysroot) ld_canon_sysroot_len = strlen (ld_canon_sysroot); else ld_canon_sysroot_len = -1; /* Set the default BFD target based on the configured target. Doing this permits the linker to be configured for a particular target, and linked against a shared BFD library which was configured for a different target. The macro TARGET is defined by Makefile. */ if (! bfd_set_default_target (TARGET)) { einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); xexit (1); } #if YYDEBUG { extern int yydebug; yydebug = 1; } #endif config.build_constructors = TRUE; config.rpath_separator = ':'; config.split_by_reloc = (unsigned) -1; config.split_by_file = (bfd_size_type) -1; config.make_executable = TRUE; config.magic_demand_paged = TRUE; config.text_read_only = TRUE; command_line.warn_mismatch = TRUE; command_line.warn_search_mismatch = TRUE; command_line.check_section_addresses = -1; command_line.disable_target_specific_optimizations = -1; /* We initialize DEMANGLING based on the environment variable COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the output of the linker, unless COLLECT_NO_DEMANGLE is set in the environment. Acting the same way here lets us provide the same interface by default. */ demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; link_info.allow_undefined_version = TRUE; link_info.keep_memory = TRUE; link_info.combreloc = TRUE; link_info.strip_discarded = TRUE; link_info.emit_hash = TRUE; link_info.callbacks = &link_callbacks; link_info.input_bfds_tail = &link_info.input_bfds; /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init and _fini symbols. We are compatible. */ link_info.init_function = "_init"; link_info.fini_function = "_fini"; link_info.relax_pass = 1; link_info.pei386_auto_import = -1; link_info.spare_dynamic_tags = 5; link_info.path_separator = ':'; ldfile_add_arch (""); emulation = get_emulation (argc, argv); ldemul_choose_mode (emulation); default_target = ldemul_choose_target (argc, argv); config.maxpagesize = bfd_emul_get_maxpagesize (default_target); config.commonpagesize = bfd_emul_get_commonpagesize (default_target); lang_init (); ldemul_before_parse (); lang_has_input_file = FALSE; parse_args (argc, argv); if (config.hash_table_size != 0) bfd_hash_set_default_size (config.hash_table_size); ldemul_set_symbols (); if (link_info.relocatable) { if (command_line.check_section_addresses < 0) command_line.check_section_addresses = 0; if (link_info.shared) einfo (_("%P%F: -r and -shared may not be used together\n")); } /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and --dynamic-list FILE. -Bsymbolic and -Bsymbolic-functions are for shared libraries. -Bsymbolic overrides all others and vice versa. */ switch (command_line.symbolic) { case symbolic_unset: break; case symbolic: /* -Bsymbolic is for shared library only. */ if (link_info.shared) { link_info.symbolic = TRUE; /* Should we free the unused memory? */ link_info.dynamic_list = NULL; command_line.dynamic_list = dynamic_list_unset; } break; case symbolic_functions: /* -Bsymbolic-functions is for shared library only. */ if (link_info.shared) command_line.dynamic_list = dynamic_list_data; break; } switch (command_line.dynamic_list) { case dynamic_list_unset: break; case dynamic_list_data: link_info.dynamic_data = TRUE; case dynamic_list: link_info.dynamic = TRUE; break; } if (! link_info.shared) { if (command_line.filter_shlib) einfo (_("%P%F: -F may not be used without -shared\n")); if (command_line.auxiliary_filters) einfo (_("%P%F: -f may not be used without -shared\n")); } if (! link_info.shared || link_info.pie) link_info.executable = TRUE; /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I don't see how else this can be handled, since in this case we must preserve all externally visible symbols. */ if (link_info.relocatable && link_info.strip == strip_all) { link_info.strip = strip_debugger; if (link_info.discard == discard_sec_merge) link_info.discard = discard_all; } /* If we have not already opened and parsed a linker script, try the default script from command line first. */ if (saved_script_handle == NULL && command_line.default_script != NULL) { ldfile_open_command_file (command_line.default_script); parser_input = input_script; yyparse (); } /* If we have not already opened and parsed a linker script read the emulation's appropriate default script. */ if (saved_script_handle == NULL) { int isfile; char *s = ldemul_get_script (&isfile); if (isfile) ldfile_open_default_command_file (s); else { lex_string = s; lex_redirect (s); } parser_input = input_script; yyparse (); lex_string = NULL; } if (trace_file_tries) { if (saved_script_handle) info_msg (_("using external linker script:")); else info_msg (_("using internal linker script:")); info_msg ("\n==================================================\n"); if (saved_script_handle) { static const int ld_bufsz = 8193; size_t n; char *buf = (char *) xmalloc (ld_bufsz); rewind (saved_script_handle); while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) { buf[n] = 0; info_msg (buf); } rewind (saved_script_handle); free (buf); } else { int isfile; info_msg (ldemul_get_script (&isfile)); } info_msg ("\n==================================================\n"); } lang_final (); if (!lang_has_input_file) { if (version_printed) xexit (0); einfo (_("%P%F: no input files\n")); } if (trace_files) info_msg (_("%P: mode %s\n"), emulation); ldemul_after_parse (); if (config.map_filename) { if (strcmp (config.map_filename, "-") == 0) { config.map_file = stdout; } else { config.map_file = fopen (config.map_filename, FOPEN_WT); if (config.map_file == (FILE *) NULL) { bfd_set_error (bfd_error_system_call); einfo (_("%P%F: cannot open map file %s: %E\n"), config.map_filename); } } } lang_process (); /* Print error messages for any missing symbols, for any warning symbols, and possibly multiple definitions. */ if (link_info.relocatable) link_info.output_bfd->flags &= ~EXEC_P; else link_info.output_bfd->flags |= EXEC_P; ldwrite (); if (config.map_file != NULL) lang_map (); if (command_line.cref) output_cref (config.map_file != NULL ? config.map_file : stdout); if (nocrossref_list != NULL) check_nocrossrefs (); lang_finish (); /* Even if we're producing relocatable output, some non-fatal errors should be reported in the exit status. (What non-fatal errors, if any, do we want to ignore for relocatable output?) */ if (!config.make_executable && !force_make_executable) { if (trace_files) einfo (_("%P: link errors found, deleting executable `%s'\n"), output_filename); /* The file will be removed by remove_output. */ xexit (1); } else { if (! bfd_close (link_info.output_bfd)) einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); /* If the --force-exe-suffix is enabled, and we're making an executable file and it doesn't end in .exe, copy it to one which does. */ if (! link_info.relocatable && command_line.force_exe_suffix) { int len = strlen (output_filename); if (len < 4 || (strcasecmp (output_filename + len - 4, ".exe") != 0 && strcasecmp (output_filename + len - 4, ".dll") != 0)) { FILE *src; FILE *dst; const int bsize = 4096; char *buf = (char *) xmalloc (bsize); int l; char *dst_name = (char *) xmalloc (len + 5); strcpy (dst_name, output_filename); strcat (dst_name, ".exe"); src = fopen (output_filename, FOPEN_RB); dst = fopen (dst_name, FOPEN_WB); if (!src) einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename); if (!dst) einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name); while ((l = fread (buf, 1, bsize, src)) > 0) { int done = fwrite (buf, 1, l, dst); if (done != l) einfo (_("%P: Error writing file `%s'\n"), dst_name); } fclose (src); if (fclose (dst) == EOF) einfo (_("%P: Error closing file `%s'\n"), dst_name); free (dst_name); free (buf); } } } END_PROGRESS (program_name); if (config.stats) { #ifdef HAVE_SBRK char *lim = (char *) sbrk (0); #endif long run_time = get_run_time () - start_time; fflush (stdout); fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), program_name, run_time / 1000000, run_time % 1000000); #ifdef HAVE_SBRK fprintf (stderr, _("%s: data size %ld\n"), program_name, (long) (lim - (char *) &environ)); #endif fflush (stderr); } /* Prevent remove_output from doing anything, after a successful link. */ output_filename = NULL; xexit (0); return 0; }
int main (int argc, char **argv) { char *emulation; long start_time = get_run_time (); #ifdef HAVE_SBRK char *start_sbrk = (char *) sbrk (0); #endif #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); #endif #if defined (HAVE_SETLOCALE) setlocale (LC_CTYPE, ""); #endif bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); program_name = argv[0]; xmalloc_set_program_name (program_name); START_PROGRESS (program_name, 0); expandargv (&argc, &argv); bfd_init (); bfd_set_error_program_name (program_name); /* We want to notice and fail on those nasty BFD assertions which are likely to signal incorrect output being generated but otherwise may leave no trace. */ default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); xatexit (ld_cleanup); /* Set up the sysroot directory. */ ld_sysroot = get_sysroot (argc, argv); if (*ld_sysroot) ld_canon_sysroot = lrealpath (ld_sysroot); if (ld_canon_sysroot) ld_canon_sysroot_len = strlen (ld_canon_sysroot); else ld_canon_sysroot_len = -1; /* Set the default BFD target based on the configured target. Doing this permits the linker to be configured for a particular target, and linked against a shared BFD library which was configured for a different target. The macro TARGET is defined by Makefile. */ if (! bfd_set_default_target (TARGET)) { einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); xexit (1); } #if YYDEBUG { extern int yydebug; yydebug = 1; } #endif config.build_constructors = TRUE; config.rpath_separator = ':'; config.split_by_reloc = (unsigned) -1; config.split_by_file = (bfd_size_type) -1; config.make_executable = TRUE; config.magic_demand_paged = TRUE; config.text_read_only = TRUE; link_info.disable_target_specific_optimizations = -1; command_line.warn_mismatch = TRUE; command_line.warn_search_mismatch = TRUE; command_line.check_section_addresses = -1; /* We initialize DEMANGLING based on the environment variable COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the output of the linker, unless COLLECT_NO_DEMANGLE is set in the environment. Acting the same way here lets us provide the same interface by default. */ demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; link_info.allow_undefined_version = TRUE; link_info.keep_memory = TRUE; link_info.combreloc = TRUE; link_info.strip_discarded = TRUE; link_info.emit_hash = TRUE; link_info.callbacks = &link_callbacks; link_info.input_bfds_tail = &link_info.input_bfds; /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init and _fini symbols. We are compatible. */ link_info.init_function = "_init"; link_info.fini_function = "_fini"; link_info.relax_pass = 1; link_info.extern_protected_data = -1; link_info.dynamic_undefined_weak = -1; link_info.pei386_auto_import = -1; link_info.spare_dynamic_tags = 5; link_info.path_separator = ':'; #ifdef DEFAULT_FLAG_COMPRESS_DEBUG link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; #endif ldfile_add_arch (""); emulation = get_emulation (argc, argv); ldemul_choose_mode (emulation); default_target = ldemul_choose_target (argc, argv); config.maxpagesize = bfd_emul_get_maxpagesize (default_target); config.commonpagesize = bfd_emul_get_commonpagesize (default_target); lang_init (); ldexp_init (); ldemul_before_parse (); lang_has_input_file = FALSE; parse_args (argc, argv); if (config.hash_table_size != 0) bfd_hash_set_default_size (config.hash_table_size); #ifdef ENABLE_PLUGINS /* Now all the plugin arguments have been gathered, we can load them. */ plugin_load_plugins (); #endif /* ENABLE_PLUGINS */ ldemul_set_symbols (); /* If we have not already opened and parsed a linker script, try the default script from command line first. */ if (saved_script_handle == NULL && command_line.default_script != NULL) { ldfile_open_command_file (command_line.default_script); parser_input = input_script; yyparse (); } /* If we have not already opened and parsed a linker script read the emulation's appropriate default script. */ if (saved_script_handle == NULL) { int isfile; char *s = ldemul_get_script (&isfile); if (isfile) ldfile_open_default_command_file (s); else { lex_string = s; lex_redirect (s, _("built in linker script"), 1); } parser_input = input_script; yyparse (); lex_string = NULL; } if (verbose) { if (saved_script_handle) info_msg (_("using external linker script:")); else info_msg (_("using internal linker script:")); info_msg ("\n==================================================\n"); if (saved_script_handle) { static const int ld_bufsz = 8193; size_t n; char *buf = (char *) xmalloc (ld_bufsz); rewind (saved_script_handle); while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) { buf[n] = 0; info_msg (buf); } rewind (saved_script_handle); free (buf); } else { int isfile; info_msg (ldemul_get_script (&isfile)); } info_msg ("\n==================================================\n"); } if (command_line.print_output_format) info_msg ("%s\n", lang_get_output_target ()); lang_final (); /* If the only command line argument has been -v or --version or --verbose then ignore any input files provided by linker scripts and exit now. We do not want to create an output file when the linker is just invoked to provide version information. */ if (argc == 2 && version_printed) xexit (0); if (!lang_has_input_file) { if (version_printed || command_line.print_output_format) xexit (0); einfo (_("%P%F: no input files\n")); } if (trace_files) info_msg (_("%P: mode %s\n"), emulation); ldemul_after_parse (); if (config.map_filename) { if (strcmp (config.map_filename, "-") == 0) { config.map_file = stdout; } else { config.map_file = fopen (config.map_filename, FOPEN_WT); if (config.map_file == (FILE *) NULL) { bfd_set_error (bfd_error_system_call); einfo (_("%P%F: cannot open map file %s: %E\n"), config.map_filename); } } } lang_process (); /* Print error messages for any missing symbols, for any warning symbols, and possibly multiple definitions. */ if (bfd_link_relocatable (&link_info)) link_info.output_bfd->flags &= ~EXEC_P; else link_info.output_bfd->flags |= EXEC_P; if ((link_info.compress_debug & COMPRESS_DEBUG)) { link_info.output_bfd->flags |= BFD_COMPRESS; if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) link_info.output_bfd->flags |= BFD_COMPRESS_GABI; } ldwrite (); if (config.map_file != NULL) lang_map (); if (command_line.cref) output_cref (config.map_file != NULL ? config.map_file : stdout); if (nocrossref_list != NULL) check_nocrossrefs (); if (command_line.print_memory_usage) lang_print_memory_usage (); #if 0 { struct bfd_link_hash_entry * h; h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); } #endif ldexp_finish (); lang_finish (); /* Even if we're producing relocatable output, some non-fatal errors should be reported in the exit status. (What non-fatal errors, if any, do we want to ignore for relocatable output?) */ if (!config.make_executable && !force_make_executable) { if (trace_files) einfo (_("%P: link errors found, deleting executable `%s'\n"), output_filename); /* The file will be removed by ld_cleanup. */ xexit (1); } else { if (! bfd_close (link_info.output_bfd)) einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd); /* If the --force-exe-suffix is enabled, and we're making an executable file and it doesn't end in .exe, copy it to one which does. */ if (!bfd_link_relocatable (&link_info) && command_line.force_exe_suffix) { int len = strlen (output_filename); if (len < 4 || (strcasecmp (output_filename + len - 4, ".exe") != 0 && strcasecmp (output_filename + len - 4, ".dll") != 0)) { FILE *src; FILE *dst; const int bsize = 4096; char *buf = (char *) xmalloc (bsize); int l; char *dst_name = (char *) xmalloc (len + 5); strcpy (dst_name, output_filename); strcat (dst_name, ".exe"); src = fopen (output_filename, FOPEN_RB); dst = fopen (dst_name, FOPEN_WB); if (!src) einfo (_("%P%F: unable to open for source of copy `%s'\n"), output_filename); if (!dst) einfo (_("%P%F: unable to open for destination of copy `%s'\n"), dst_name); while ((l = fread (buf, 1, bsize, src)) > 0) { int done = fwrite (buf, 1, l, dst); if (done != l) einfo (_("%P: Error writing file `%s'\n"), dst_name); } fclose (src); if (fclose (dst) == EOF) einfo (_("%P: Error closing file `%s'\n"), dst_name); free (dst_name); free (buf); } } } END_PROGRESS (program_name); if (config.stats) { #ifdef HAVE_SBRK char *lim = (char *) sbrk (0); #endif long run_time = get_run_time () - start_time; fflush (stdout); fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), program_name, run_time / 1000000, run_time % 1000000); #ifdef HAVE_SBRK fprintf (stderr, _("%s: data size %ld\n"), program_name, (long) (lim - start_sbrk)); #endif fflush (stderr); } /* Prevent ld_cleanup from doing anything, after a successful link. */ output_filename = NULL; xexit (0); return 0; }