X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=binutils%2Fstrings.c;h=58b7e8ab13d4ed03ab774cde22d79a895c73b9d3;hb=128e85e3ab36b8e30f6612fb50de3cbb4ede6824;hp=e5519e1420917966e59c562cc46ae2be8e8840b7;hpb=b43b5d5f768ed7a7a150d78c9fda0c194a11497d;p=deliverable%2Fbinutils-gdb.git diff --git a/binutils/strings.c b/binutils/strings.c index e5519e1420..58b7e8ab13 100644 --- a/binutils/strings.c +++ b/binutils/strings.c @@ -1,10 +1,9 @@ /* strings -- print the strings of printable characters in files - Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, - 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 1993-2016 Free Software Foundation, Inc. This program 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 2, or (at your option) + the Free Software Foundation; either version 3, or (at your option) any later version. This program is distributed in the hope that it will be useful, @@ -22,7 +21,10 @@ Options: --all -a - - Do not scan only the initialized data section of object files. + - Scan each file in its entirety. + + --data + -d Scan only the initialized data section(s) of object files. --print-file-name -f Print the name of the file before each string. @@ -36,6 +38,10 @@ -t {o,x,d} Print the offset within the file before each string, in octal/hex/decimal. + --include-all-whitespace + -w By default tab and space are the only whitepace included in graphic + char sequences. This option considers all of isspace() valid. + -o Like -to. (Some other implementations have -o like -to, others like -td. We chose one arbitrarily.) @@ -46,50 +52,36 @@ littleendian 32-bit. --target=BFDNAME + -T {bfdname} Specify a non-default object file format. + --output-separator=sep_string + -s sep_string String used to separate parsed strings in output. + Default is newline. + --help -h Print the usage message on the standard output. --version + -V -v Print the program version number. Written by Richard Stallman and David MacKenzie . */ -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif +#include "sysdep.h" #include "bfd.h" -#include #include "getopt.h" -#include -#include "bucomm.h" #include "libiberty.h" #include "safe-ctype.h" -#include - -/* Some platforms need to put stdin into binary mode, to read - binary files. */ -#ifdef HAVE_SETMODE -#ifndef O_BINARY -#ifdef _O_BINARY -#define O_BINARY _O_BINARY -#define setmode _setmode -#else -#define O_BINARY 0 -#endif -#endif -#if O_BINARY -#include -#define SET_BINARY(f) do { if (!isatty (f)) setmode (f,O_BINARY); } while (0) -#endif -#endif +#include "bucomm.h" #define STRING_ISGRAPHIC(c) \ ( (c) >= 0 \ && (c) <= 255 \ - && ((c) == '\t' || ISPRINT (c) || (encoding == 'S' && (c) > 127))) + && ((c) == '\t' || ISPRINT (c) || (encoding == 'S' && (c) > 127) \ + || (include_all_whitespace == TRUE && ISSPACE (c))) \ + ) #ifndef errno extern int errno; @@ -98,27 +90,15 @@ extern int errno; /* The BFD section flags that identify an initialized data section. */ #define DATA_FLAGS (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS) -#ifdef HAVE_FOPEN64 -typedef off64_t file_off; -#define file_open(s,m) fopen64(s, m) -#else -typedef off_t file_off; -#define file_open(s,m) fopen(s, m) -#endif -#ifdef HAVE_STAT64 -typedef struct stat64 statbuf; -#define file_stat(f,s) stat64(f, s) -#else -typedef struct stat statbuf; -#define file_stat(f,s) stat(f, s) -#endif - /* Radix for printing addresses (must be 8, 10 or 16). */ static int address_radix; /* Minimum length of sequence of graphic chars to trigger output. */ static int string_min; +/* Whether or not we include all whitespace as a graphic char. */ +static bfd_boolean include_all_whitespace; + /* TRUE means print address within file for each string. */ static bfd_boolean print_addresses; @@ -138,26 +118,37 @@ static char *target; static char encoding; static int encoding_bytes; +/* Output string used to separate parsed strings */ +static char *output_separator; + static struct option long_options[] = { {"all", no_argument, NULL, 'a'}, + {"data", no_argument, NULL, 'd'}, {"print-file-name", no_argument, NULL, 'f'}, {"bytes", required_argument, NULL, 'n'}, {"radix", required_argument, NULL, 't'}, + {"include-all-whitespace", required_argument, NULL, 'w'}, {"encoding", required_argument, NULL, 'e'}, {"target", required_argument, NULL, 'T'}, + {"output-separator", required_argument, NULL, 's'}, {"help", no_argument, NULL, 'h'}, {"version", no_argument, NULL, 'v'}, {NULL, 0, NULL, 0} }; -static void strings_a_section (bfd *, asection *, void *); -static bfd_boolean strings_object_file (const char *); -static bfd_boolean strings_file (char *file); -static int integer_arg (char *s); -static void print_strings (const char *, FILE *, file_off, int, int, char *); -static void usage (FILE *, int); -static long get_char (FILE *, file_off *, int *, char **); +/* Records the size of a named file so that we + do not repeatedly run bfd_stat() on it. */ + +typedef struct +{ + const char * filename; + bfd_size_type filesize; +} filename_and_size_t; + +static bfd_boolean strings_file (char *); +static void print_strings (const char *, FILE *, file_ptr, int, int, char *); +static void usage (FILE *, int) ATTRIBUTE_NORETURN; int main (int, char **); @@ -167,6 +158,8 @@ main (int argc, char **argv) int optc; int exit_status = 0; bfd_boolean files_given = FALSE; + char *s; + int numeric_opt = 0; #if defined (HAVE_SETLOCALE) setlocale (LC_ALL, ""); @@ -176,14 +169,23 @@ main (int argc, char **argv) program_name = argv[0]; xmalloc_set_program_name (program_name); - string_min = -1; + bfd_set_error_program_name (program_name); + + expandargv (&argc, &argv); + + string_min = 4; + include_all_whitespace = FALSE; print_addresses = FALSE; print_filenames = FALSE; - datasection_only = TRUE; + if (DEFAULT_STRINGS_ALL) + datasection_only = FALSE; + else + datasection_only = TRUE; target = NULL; encoding = 's'; + output_separator = NULL; - while ((optc = getopt_long (argc, argv, "afhHn:ot:e:Vv0123456789", + while ((optc = getopt_long (argc, argv, "adfhHn:wot:e:T:s:Vv0123456789", long_options, (int *) 0)) != EOF) { switch (optc) @@ -192,6 +194,10 @@ main (int argc, char **argv) datasection_only = FALSE; break; + case 'd': + datasection_only = TRUE; + break; + case 'f': print_filenames = TRUE; break; @@ -201,9 +207,13 @@ main (int argc, char **argv) usage (stdout, 0); case 'n': - string_min = integer_arg (optarg); - if (string_min < 1) - fatal (_("invalid number %s"), optarg); + string_min = (int) strtoul (optarg, &s, 0); + if (s != NULL && *s != 0) + fatal (_("invalid integer argument %s"), optarg); + break; + + case 'w': + include_all_whitespace = TRUE; break; case 'o': @@ -244,6 +254,10 @@ main (int argc, char **argv) encoding = optarg[0]; break; + case 's': + output_separator = optarg; + break; + case 'V': case 'v': print_version ("strings"); @@ -253,16 +267,19 @@ main (int argc, char **argv) usage (stderr, 1); default: - if (string_min < 0) - string_min = optc - '0'; - else - string_min = string_min * 10 + optc - '0'; + numeric_opt = optind; break; } } - if (string_min < 0) - string_min = 4; + if (numeric_opt != 0) + { + string_min = (int) strtoul (argv[numeric_opt - 1] + 1, &s, 0); + if (s != NULL && *s != 0) + fatal (_("invalid integer argument %s"), argv[numeric_opt - 1] + 1); + } + if (string_min < 1) + fatal (_("invalid minimum string length %d"), string_min); switch (encoding) { @@ -288,9 +305,7 @@ main (int argc, char **argv) if (optind >= argc) { datasection_only = FALSE; -#ifdef SET_BINARY SET_BINARY (fileno (stdin)); -#endif print_strings ("{standard input}", stdin, 0, 0, 0, (char *) NULL); files_given = TRUE; } @@ -314,27 +329,62 @@ main (int argc, char **argv) return (exit_status); } -/* Scan section SECT of the file ABFD, whose printable name is FILE. - If it contains initialized data, - set `got_a_section' and print the strings in it. */ +/* Scan section SECT of the file ABFD, whose printable name is in + ARG->filename and whose size might be in ARG->filesize. If it + contains initialized data set `got_a_section' and print the + strings in it. + + FIXME: We ought to be able to return error codes/messages for + certain conditions. */ static void -strings_a_section (bfd *abfd, asection *sect, void *filearg) +strings_a_section (bfd *abfd, asection *sect, void *arg) { - const char *file = (const char *) filearg; + filename_and_size_t * filename_and_sizep; + bfd_size_type *filesizep; + bfd_size_type sectsize; + void *mem; - if ((sect->flags & DATA_FLAGS) == DATA_FLAGS) + if ((sect->flags & DATA_FLAGS) != DATA_FLAGS) + return; + + sectsize = bfd_get_section_size (sect); + + if (sectsize <= 0) + return; + + /* Get the size of the file. This might have been cached for us. */ + filename_and_sizep = (filename_and_size_t *) arg; + filesizep = & filename_and_sizep->filesize; + + if (*filesizep == 0) { - bfd_size_type sz = bfd_get_section_size (sect); - void *mem = xmalloc (sz); + struct stat st; - if (bfd_get_section_contents (abfd, sect, mem, (file_ptr) 0, sz)) - { - got_a_section = TRUE; - print_strings (file, (FILE *) NULL, sect->filepos, 0, sz, mem); - } - free (mem); + if (bfd_stat (abfd, &st)) + return; + + /* Cache the result so that we do not repeatedly stat this file. */ + *filesizep = st.st_size; + } + + /* Compare the size of the section against the size of the file. + If the section is bigger then the file must be corrupt and + we should not try dumping it. */ + if (sectsize >= *filesizep) + return; + + mem = xmalloc (sectsize); + + if (bfd_get_section_contents (abfd, sect, mem, (file_ptr) 0, sectsize)) + { + got_a_section = TRUE; + + print_strings (filename_and_sizep->filename, NULL, sect->filepos, + 0, sectsize, (char *) mem); } + + free (mem); } /* Scan all of the sections in FILE, and print the strings @@ -346,7 +396,10 @@ strings_a_section (bfd *abfd, asection *sect, void *filearg) static bfd_boolean strings_object_file (const char *file) { - bfd *abfd = bfd_openr (file, target); + filename_and_size_t filename_and_size; + bfd *abfd; + + abfd = bfd_openr (file, target); if (abfd == NULL) /* Treat the file as a non-object file. */ @@ -362,7 +415,9 @@ strings_object_file (const char *file) } got_a_section = FALSE; - bfd_map_over_sections (abfd, strings_a_section, (void *) file); + filename_and_size.filename = file; + filename_and_size.filesize = 0; + bfd_map_over_sections (abfd, strings_a_section, & filename_and_size); if (!bfd_close (abfd)) { @@ -378,9 +433,11 @@ strings_object_file (const char *file) static bfd_boolean strings_file (char *file) { - statbuf st; + struct stat st; + + /* get_file_size does not support non-S_ISREG files. */ - if (file_stat (file, &st) < 0) + if (stat (file, &st) < 0) { if (errno == ENOENT) non_fatal (_("'%s': No such file"), file); @@ -398,7 +455,7 @@ strings_file (char *file) { FILE *stream; - stream = file_open (file, FOPEN_RB); + stream = fopen (file, FOPEN_RB); if (stream == NULL) { fprintf (stderr, "%s: ", program_name); @@ -406,7 +463,7 @@ strings_file (char *file) return FALSE; } - print_strings (file, stream, (file_off) 0, 0, 0, (char *) 0); + print_strings (file, stream, (file_ptr) 0, 0, 0, (char *) 0); if (fclose (stream) == EOF) { @@ -430,11 +487,10 @@ strings_file (char *file) MAGICCOUNT is how many characters are in it. */ static long -get_char (FILE *stream, file_off *address, int *magiccount, char **magic) +get_char (FILE *stream, file_ptr *address, int *magiccount, char **magic) { int c, i; - long r = EOF; - unsigned char buf[4]; + long r = 0; for (i = 0; i < encoding_bytes; i++) { @@ -447,7 +503,12 @@ get_char (FILE *stream, file_off *address, int *magiccount, char **magic) { if (stream == NULL) return EOF; -#ifdef HAVE_GETC_UNLOCKED + + /* Only use getc_unlocked if we found a declaration for it. + Otherwise, libc is not thread safe by default, and we + should not use it. */ + +#if defined(HAVE_GETC_UNLOCKED) && HAVE_DECL_GETC_UNLOCKED c = getc_unlocked (stream); #else c = getc (stream); @@ -457,34 +518,22 @@ get_char (FILE *stream, file_off *address, int *magiccount, char **magic) } (*address)++; - buf[i] = c; + r = (r << 8) | (c & 0xff); } switch (encoding) { - case 'S': - case 's': - r = buf[0]; - break; - case 'b': - r = (buf[0] << 8) | buf[1]; + default: break; case 'l': - r = buf[0] | (buf[1] << 8); - break; - case 'B': - r = ((long) buf[0] << 24) | ((long) buf[1] << 16) | - ((long) buf[2] << 8) | buf[3]; + r = ((r & 0xff) << 8) | ((r & 0xff00) >> 8); break; case 'L': - r = buf[0] | ((long) buf[1] << 8) | ((long) buf[2] << 16) | - ((long) buf[3] << 24); + r = (((r & 0xff) << 24) | ((r & 0xff00) << 8) + | ((r & 0xff0000) >> 8) | ((r & 0xff000000) >> 24)); break; } - if (r == EOF) - return 0; - return r; } @@ -501,14 +550,14 @@ get_char (FILE *stream, file_off *address, int *magiccount, char **magic) Those characters come at address ADDRESS and the data in STREAM follow. */ static void -print_strings (const char *filename, FILE *stream, file_off address, +print_strings (const char *filename, FILE *stream, file_ptr address, int stop_point, int magiccount, char *magic) { char *buf = (char *) xmalloc (sizeof (char) * (string_min + 1)); while (1) { - file_off start; + file_ptr start; int i; long c; @@ -521,7 +570,10 @@ print_strings (const char *filename, FILE *stream, file_off address, { c = get_char (stream, &address, &magiccount, &magic); if (c == EOF) - return; + { + free (buf); + return; + } if (! STRING_ISGRAPHIC (c)) /* Found a non-graphic. Try again starting with next char. */ goto tryline; @@ -537,47 +589,59 @@ print_strings (const char *filename, FILE *stream, file_off address, switch (address_radix) { case 8: -#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) +#ifdef HAVE_LONG_LONG if (sizeof (start) > sizeof (long)) - printf ("%7Lo ", (unsigned long long) start); + { +# ifndef __MSVCRT__ + printf ("%7llo ", (unsigned long long) start); +# else + printf ("%7I64o ", (unsigned long long) start); +# endif + } else -#else -# if !BFD_HOST_64BIT_LONG +#elif !BFD_HOST_64BIT_LONG if (start != (unsigned long) start) printf ("++%7lo ", (unsigned long) start); else -# endif #endif printf ("%7lo ", (unsigned long) start); break; case 10: -#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) +#ifdef HAVE_LONG_LONG if (sizeof (start) > sizeof (long)) - printf ("%7Ld ", (unsigned long long) start); + { +# ifndef __MSVCRT__ + printf ("%7lld ", (unsigned long long) start); +# else + printf ("%7I64d ", (unsigned long long) start); +# endif + } else -#else -# if !BFD_HOST_64BIT_LONG +#elif !BFD_HOST_64BIT_LONG if (start != (unsigned long) start) printf ("++%7ld ", (unsigned long) start); else -# endif #endif printf ("%7ld ", (long) start); break; case 16: -#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) +#ifdef HAVE_LONG_LONG if (sizeof (start) > sizeof (long)) - printf ("%7Lx ", (unsigned long long) start); + { +# ifndef __MSVCRT__ + printf ("%7llx ", (unsigned long long) start); +# else + printf ("%7I64x ", (unsigned long long) start); +# endif + } else -#else -# if !BFD_HOST_64BIT_LONG +#elif !BFD_HOST_64BIT_LONG if (start != (unsigned long) start) printf ("%lx%8.8lx ", (unsigned long) (start >> 32), (unsigned long) (start & 0xffffffff)); else -# endif #endif printf ("%7lx ", (unsigned long) start); break; @@ -596,74 +660,46 @@ print_strings (const char *filename, FILE *stream, file_off address, putchar (c); } - putchar ('\n'); - } -} - -/* Parse string S as an integer, using decimal radix by default, - but allowing octal and hex numbers as in C. */ - -static int -integer_arg (char *s) -{ - int value; - int radix = 10; - char *p = s; - int c; - - if (*p != '0') - radix = 10; - else if (*++p == 'x') - { - radix = 16; - p++; - } - else - radix = 8; - - value = 0; - while (((c = *p++) >= '0' && c <= '9') - || (radix == 16 && (c & ~40) >= 'A' && (c & ~40) <= 'Z')) - { - value *= radix; - if (c >= '0' && c <= '9') - value += c - '0'; + if (output_separator) + fputs (output_separator, stdout); else - value += (c & ~40) - 'A'; + putchar ('\n'); } - - if (c == 'b') - value *= 512; - else if (c == 'B') - value *= 1024; - else - p--; - - if (*p) - fatal (_("invalid integer argument %s"), s); - - return value; + free (buf); } - + static void usage (FILE *stream, int status) { fprintf (stream, _("Usage: %s [option(s)] [file(s)]\n"), program_name); fprintf (stream, _(" Display printable strings in [file(s)] (stdin by default)\n")); - fprintf (stream, _(" The options are:\n\ + fprintf (stream, _(" The options are:\n")); + + if (DEFAULT_STRINGS_ALL) + fprintf (stream, _("\ + -a - --all Scan the entire file, not just the data section [default]\n\ + -d --data Only scan the data sections in the file\n")); + else + fprintf (stream, _("\ -a - --all Scan the entire file, not just the data section\n\ + -d --data Only scan the data sections in the file [default]\n")); + + fprintf (stream, _("\ -f --print-file-name Print the name of the file before each string\n\ -n --bytes=[number] Locate & print any NUL-terminated sequence of at\n\ - - least [number] characters (default 4).\n\ + - least [number] characters (default 4).\n\ -t --radix={o,d,x} Print the location of the string in base 8, 10 or 16\n\ + -w --include-all-whitespace Include all whitespace as valid string characters\n\ -o An alias for --radix=o\n\ -T --target= Specify the binary file format\n\ -e --encoding={s,S,b,l,B,L} Select character size and endianness:\n\ s = 7-bit, S = 8-bit, {b,l} = 16-bit, {B,L} = 32-bit\n\ + -s --output-separator= String used to separate strings in output.\n\ + @ Read options from \n\ -h --help Display this information\n\ - -v --version Print the program's version number\n")); + -v -V --version Print the program's version number\n")); list_supported_targets (program_name, stream); - if (status == 0) + if (REPORT_BUGS_TO[0] && status == 0) fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); exit (status); }