/* Print size information from ELF file.
Copyright (C) 2000-2007,2009,2012,2014,2015 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
This file 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.
elfutils 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, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <argp.h>
#include <fcntl.h>
#include <gelf.h>
#include <inttypes.h>
#include <libelf.h>
#include <libintl.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <system.h>
#include <printversion.h>
/* Name and version of program. */
ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
/* Bug report address. */
ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
/* Values for the parameters which have no short form. */
#define OPT_FORMAT 0x100
#define OPT_RADIX 0x101
/* Definitions of arguments for argp functions. */
static const struct argp_option options[] =
{
{ NULL, 0, NULL, 0, N_("Output format:"), 0 },
{ "format", OPT_FORMAT, "FORMAT", 0,
N_("Use the output format FORMAT. FORMAT can be `bsd' or `sysv'. "
"The default is `bsd'"), 0 },
{ NULL, 'A', NULL, 0, N_("Same as `--format=sysv'"), 0 },
{ NULL, 'B', NULL, 0, N_("Same as `--format=bsd'"), 0 },
{ "radix", OPT_RADIX, "RADIX", 0, N_("Use RADIX for printing symbol values"),
0},
{ NULL, 'd', NULL, 0, N_("Same as `--radix=10'"), 0 },
{ NULL, 'o', NULL, 0, N_("Same as `--radix=8'"), 0 },
{ NULL, 'x', NULL, 0, N_("Same as `--radix=16'"), 0 },
{ NULL, 'f', NULL, 0,
N_("Similar to `--format=sysv' output but in one line"), 0 },
{ NULL, 0, NULL, 0, N_("Output options:"), 0 },
{ NULL, 'F', NULL, 0,
N_("Print size and permission flags for loadable segments"), 0 },
{ "totals", 't', NULL, 0, N_("Display the total sizes (bsd only)"), 0 },
{ NULL, 0, NULL, 0, NULL, 0 }
};
/* Short description of program. */
static const char doc[] = N_("\
List section sizes of FILEs (a.out by default).");
/* Strings for arguments in help texts. */
static const char args_doc[] = N_("[FILE...]");
/* Prototype for option handler. */
static error_t parse_opt (int key, char *arg, struct argp_state *state);
/* Data structure to communicate with argp functions. */
static struct argp argp =
{
options, parse_opt, args_doc, doc, NULL, NULL, NULL
};
/* Print symbols in file named FNAME. */
static int process_file (const char *fname);
/* Handle content of archive. */
static int handle_ar (int fd, Elf *elf, const char *prefix, const char *fname);
/* Handle ELF file. */
static void handle_elf (Elf *elf, const char *fullname, const char *fname);
/* Show total size. */
static void show_bsd_totals (void);
#define INTERNAL_ERROR(fname) \
error (EXIT_FAILURE, 0, gettext ("%s: INTERNAL ERROR %d (%s): %s"), \
fname, __LINE__, PACKAGE_VERSION, elf_errmsg (-1))
/* User-selectable options. */
/* The selected output format. */
static enum
{
format_bsd = 0,
format_sysv,
format_sysv_one_line,
format_segments
} format;
/* Radix for printed numbers. */
static enum
{
radix_decimal = 0,
radix_hex,
radix_octal
} radix;
/* Mapping of radix and binary class to length. */
static const int length_map[2][3] =
{
[ELFCLASS32 - 1] =
{
[radix_hex] = 8,
[radix_decimal] = 10,
[radix_octal] = 11
},
[ELFCLASS64 - 1] =
{
[radix_hex] = 16,
[radix_decimal] = 20,
[radix_octal] = 22
}
};
/* True if total sizes should be printed. */
static bool totals;
/* To print the total sizes in a reasonable format remember the higest
"class" of ELF binaries processed. */
static int totals_class;
int
main (int argc, char *argv[])
{
int remaining;
int result = 0;
/* We use no threads here which can interfere with handling a stream. */
__fsetlocking (stdin, FSETLOCKING_BYCALLER);
__fsetlocking (stdout, FSETLOCKING_BYCALLER);
__fsetlocking (stderr, FSETLOCKING_BYCALLER);
/* Set locale. */
setlocale (LC_ALL, "");
/* Make sure the message catalog can be found. */
bindtextdomain (PACKAGE_TARNAME, LOCALEDIR);
/* Initialize the message catalog. */
textdomain (PACKAGE_TARNAME);
/* Parse and process arguments. */
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
/* Tell the library which version we are expecting. */
elf_version (EV_CURRENT);
if (remaining == argc)
/* The user didn't specify a name so we use a.out. */
result = process_file ("a.out");
else
/* Process all the remaining files. */
do
result |= process_file (argv[remaining]);
while (++remaining < argc);
/* Print the total sizes but only if the output format is BSD and at
least one file has been correctly read (i.e., we recognized the
class). */
if (totals && format == format_bsd && totals_class != 0)
show_bsd_totals ();
return result;
}
/* Handle program arguments. */
static error_t
parse_opt (int key, char *arg,
struct argp_state *state __attribute__ ((unused)))
{
switch (key)
{
case 'd':
radix = radix_decimal;
break;
case 'f':
format = format_sysv_one_line;
break;
case 'o':
radix = radix_octal;
break;
case 'x':
radix = radix_hex;
break;
case 'A':
format = format_sysv;
break;
case 'B':
format = format_bsd;
break;
case 'F':
format = format_segments;
break;
case OPT_FORMAT:
if (strcmp (arg, "bsd") == 0 || strcmp (arg, "berkeley") == 0)
format = format_bsd;
else if (likely (strcmp (arg, "sysv") == 0))
format = format_sysv;
else
error (EXIT_FAILURE, 0, gettext ("Invalid format: %s"), arg);
break;
case OPT_RADIX:
if (strcmp (arg, "x") == 0 || strcmp (arg, "16") == 0)
radix = radix_hex;
else if (strcmp (arg, "d") == 0 || strcmp (arg, "10") == 0)
radix = radix_decimal;
else if (strcmp (arg, "o") == 0 || strcmp (arg, "8") == 0)
radix = radix_octal;
else
error (EXIT_FAILURE, 0, gettext ("Invalid radix: %s"), arg);
break;
case 't':
totals = true;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Open the file and determine the type. */
static int
process_file (const char *fname)
{
int fd = open (fname, O_RDONLY);
if (unlikely (fd == -1))
{
error (0, errno, gettext ("cannot open '%s'"), fname);
return 1;
}
/* Now get the ELF descriptor. */
Elf *elf = elf_begin (fd, ELF_C_READ_MMAP, NULL);
if (likely (elf != NULL))
{
if (elf_kind (elf) == ELF_K_ELF)
{
handle_elf (elf, NULL, fname);
if (unlikely (elf_end (elf) != 0))
INTERNAL_ERROR (fname);
if (unlikely (close (fd) != 0))
error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
return 0;
}
else if (likely (elf_kind (elf) == ELF_K_AR))
{
int result = handle_ar (fd, elf, NULL, fname);
if (unlikely (close (fd) != 0))
error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
return result;
}
/* We cannot handle this type. Close the descriptor anyway. */
if (unlikely (elf_end (elf) != 0))
INTERNAL_ERROR (fname);
}
if (unlikely (close (fd) != 0))
error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
error (0, 0, gettext ("%s: file format not recognized"), fname);
return 1;
}
/* Print the BSD-style header. This is done exactly once. */
static void
print_header (Elf *elf)
{
static int done;
if (! done)
{
int ddigits = length_map[gelf_getclass (elf) - 1][radix_decimal];
int xdigits = length_map[gelf_getclass (elf) - 1][radix_hex];
printf ("%*s %*s %*s %*s %*s %s\n",
ddigits - 2, sgettext ("bsd|text"),
ddigits - 2, sgettext ("bsd|data"),
ddigits - 2, sgettext ("bsd|bss"),
ddigits - 2, sgettext ("bsd|dec"),
xdigits - 2, sgettext ("bsd|hex"),
sgettext ("bsd|filename"));
done = 1;
}
}
static int
handle_ar (int fd, Elf *elf, const char *prefix, const char *fname)
{
size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
size_t fname_len = strlen (fname) + 1;
char new_prefix[prefix_len + 1 + fname_len];
char *cp = new_prefix;
/* Create the full name of the file. */
if (prefix != NULL)
{
cp = mempcpy (cp, prefix, prefix_len);
*cp++ = ':';
}
memcpy (cp, fname, fname_len);
/* Process all the files contained in the archive. */
int result = 0;
Elf *subelf;
Elf_Cmd cmd = ELF_C_READ_MMAP;
while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
{
/* The the header for this element. */
Elf_Arhdr *arhdr = elf_getarhdr (subelf);
if (elf_kind (subelf) == ELF_K_ELF)
handle_elf (subelf, new_prefix, arhdr->ar_name);
else if (likely (elf_kind (subelf) == ELF_K_AR))
result |= handle_ar (fd, subelf, new_prefix, arhdr->ar_name);
/* else signal error??? */
/* Get next archive element. */
cmd = elf_next (subelf);
if (unlikely (elf_end (subelf) != 0))
INTERNAL_ERROR (fname);
}
/* Only close ELF handle if this was a "top level" ar file. */
if (prefix == NULL)
if (unlikely (elf_end (elf) != 0))
INTERNAL_ERROR (fname);
return result;
}
/* Show sizes in SysV format. */
static void
show_sysv (Elf *elf, const char *prefix, const char *fname,
const char *fullname)
{
int maxlen = 10;
const int digits = length_map[gelf_getclass (elf) - 1][radix];
/* Get the section header string table index. */
size_t shstrndx;
if (unlikely (elf_getshdrstrndx (elf, &shstrndx) < 0))
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
/* First round over the sections: determine the longest section name. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr == NULL)
INTERNAL_ERROR (fullname);
/* Ignore all sections which are not used at runtime. */
const char *name = elf_strptr (elf, shstrndx, shdr->sh_name);
if (name != NULL && (shdr->sh_flags & SHF_ALLOC) != 0)
maxlen = MAX (maxlen, (int) strlen (name));
}
fputs_unlocked (fname, stdout);
if (prefix != NULL)
printf (gettext (" (ex %s)"), prefix);
printf (":\n%-*s %*s %*s\n",
maxlen, sgettext ("sysv|section"),
digits - 2, sgettext ("sysv|size"),
digits, sgettext ("sysv|addr"));
/* Iterate over all sections. */
GElf_Off total = 0;
while ((scn = elf_nextscn (elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr == NULL)
INTERNAL_ERROR (fullname);
/* Ignore all sections which are not used at runtime. */
if ((shdr->sh_flags & SHF_ALLOC) != 0)
{
printf ((radix == radix_hex
? "%-*s %*" PRIx64 " %*" PRIx64 "\n"
: (radix == radix_decimal
? "%-*s %*" PRId64 " %*" PRId64 "\n"
: "%-*s %*" PRIo64 " %*" PRIo64 "\n")),
maxlen, elf_strptr (elf, shstrndx, shdr->sh_name),
digits - 2, shdr->sh_size,
digits, shdr->sh_addr);
total += shdr->sh_size;
}
}
if (radix == radix_hex)
printf ("%-*s %*" PRIx64 "\n\n\n", maxlen, sgettext ("sysv|Total"),
digits - 2, total);
else if (radix == radix_decimal)
printf ("%-*s %*" PRId64 "\n\n\n", maxlen, sgettext ("sysv|Total"),
digits - 2, total);
else
printf ("%-*s %*" PRIo64 "\n\n\n", maxlen, sgettext ("sysv|Total"),
digits - 2, total);
}
/* Show sizes in SysV format in one line. */
static void
show_sysv_one_line (Elf *elf)
{
/* Get the section header string table index. */
size_t shstrndx;
if (unlikely (elf_getshdrstrndx (elf, &shstrndx) < 0))
error (EXIT_FAILURE, 0,
gettext ("cannot get section header string table index"));
/* Iterate over all sections. */
GElf_Off total = 0;
bool first = true;
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (unlikely (shdr == NULL))
error (EXIT_FAILURE, 0, gettext ("cannot get section header"));
/* Ignore all sections which are not used at runtime. */
if ((shdr->sh_flags & SHF_ALLOC) == 0)
continue;
if (! first)
fputs_unlocked (" + ", stdout);
first = false;
printf ((radix == radix_hex ? "%" PRIx64 "(%s)"
: (radix == radix_decimal ? "%" PRId64 "(%s)"
: "%" PRIo64 "(%s)")),
shdr->sh_size, elf_strptr (elf, shstrndx, shdr->sh_name));
total += shdr->sh_size;
}
if (radix == radix_hex)
printf (" = %#" PRIx64 "\n", total);
else if (radix == radix_decimal)
printf (" = %" PRId64 "\n", total);
else
printf (" = %" PRIo64 "\n", total);
}
/* Variables to add up the sizes of all files. */
static uintmax_t total_textsize;
static uintmax_t total_datasize;
static uintmax_t total_bsssize;
/* Show sizes in BSD format. */
static void
show_bsd (Elf *elf, const char *prefix, const char *fname,
const char *fullname)
{
GElf_Off textsize = 0;
GElf_Off datasize = 0;
GElf_Off bsssize = 0;
const int ddigits = length_map[gelf_getclass (elf) - 1][radix_decimal];
const int xdigits = length_map[gelf_getclass (elf) - 1][radix_hex];
/* Iterate over all sections. */
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
if (shdr == NULL)
INTERNAL_ERROR (fullname);
/* Ignore all sections which are not marked as loaded. */
if ((shdr->sh_flags & SHF_ALLOC) == 0)
continue;
if ((shdr->sh_flags & SHF_WRITE) == 0)
textsize += shdr->sh_size;
else if (shdr->sh_type == SHT_NOBITS)
bsssize += shdr->sh_size;
else
datasize += shdr->sh_size;
}
printf (radix == radix_decimal
? "%*" PRId64 " %*" PRId64 " %*" PRId64 " %*" PRId64 " %*" PRIx64 " %s"
: radix == radix_hex
? "%#*" PRIx64 " %#*" PRIx64 " %#*" PRIx64 " %*" PRId64 " %*" PRIx64 " %s"
: "%#*" PRIo64 " %#*" PRIo64 " %#*" PRIo64 " %*" PRId64 " %*" PRIx64 " %s",
ddigits - 2, textsize,
ddigits - 2, datasize,
ddigits - 2, bsssize,
ddigits - 2, textsize + datasize + bsssize,
xdigits - 2, textsize + datasize + bsssize,
fname);
if (prefix != NULL)
printf (gettext (" (ex %s)"), prefix);
fputs_unlocked ("\n", stdout);
total_textsize += textsize;
total_datasize += datasize;
total_bsssize += bsssize;
totals_class = MAX (totals_class, gelf_getclass (elf));
}
/* Show total size. */
static void
show_bsd_totals (void)
{
int ddigits = length_map[totals_class - 1][radix_decimal];
int xdigits = length_map[totals_class - 1][radix_hex];
printf ("%*" PRIuMAX " %*" PRIuMAX " %*" PRIuMAX " %*" PRIuMAX " %*"
PRIxMAX " %s",
ddigits - 2, total_textsize,
ddigits - 2, total_datasize,
ddigits - 2, total_bsssize,
ddigits - 2, total_textsize + total_datasize + total_bsssize,
xdigits - 2, total_textsize + total_datasize + total_bsssize,
gettext ("(TOTALS)\n"));
}
/* Show size and permission of loadable segments. */
static void
show_segments (Elf *elf, const char *fullname)
{
size_t phnum;
if (elf_getphdrnum (elf, &phnum) != 0)
INTERNAL_ERROR (fullname);
GElf_Off total = 0;
bool first = true;
for (size_t cnt = 0; cnt < phnum; ++cnt)
{
GElf_Phdr phdr_mem;
GElf_Phdr *phdr;
phdr = gelf_getphdr (elf, cnt, &phdr_mem);
if (phdr == NULL)
INTERNAL_ERROR (fullname);
if (phdr->p_type != PT_LOAD)
/* Only load segments. */
continue;
if (! first)
fputs_unlocked (" + ", stdout);
first = false;
printf (radix == radix_hex ? "%" PRIx64 "(%c%c%c)"
: (radix == radix_decimal ? "%" PRId64 "(%c%c%c)"
: "%" PRIo64 "(%c%c%c)"),
phdr->p_memsz,
(phdr->p_flags & PF_R) == 0 ? '-' : 'r',
(phdr->p_flags & PF_W) == 0 ? '-' : 'w',
(phdr->p_flags & PF_X) == 0 ? '-' : 'x');
total += phdr->p_memsz;
}
if (radix == radix_hex)
printf (" = %#" PRIx64 "\n", total);
else if (radix == radix_decimal)
printf (" = %" PRId64 "\n", total);
else
printf (" = %" PRIo64 "\n", total);
}
static void
handle_elf (Elf *elf, const char *prefix, const char *fname)
{
size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
size_t fname_len = strlen (fname) + 1;
char fullname[prefix_len + 1 + fname_len];
char *cp = fullname;
/* Create the full name of the file. */
if (prefix != NULL)
{
cp = mempcpy (cp, prefix, prefix_len);
*cp++ = ':';
}
memcpy (cp, fname, fname_len);
if (format == format_sysv)
show_sysv (elf, prefix, fname, fullname);
else if (format == format_sysv_one_line)
show_sysv_one_line (elf);
else if (format == format_segments)
show_segments (elf, fullname);
else
{
print_header (elf);
show_bsd (elf, prefix, fname, fullname);
}
}
#include "debugpred.h"