114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
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/* Copyright (C) 2015 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <libelf.h>
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#include <gelf.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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int
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main (int argc, char *argv[])
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{
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int result = 0;
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int cnt;
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if (argc < 3
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|| (strcmp (argv[1], "read") != 0
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&& strcmp (argv[1], "mmap") != 0))
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{
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printf ("Usage: (read|mmap) files...\n");
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return -1;
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}
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bool mmap = strcmp (argv[1], "mmap") == 0;
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elf_version (EV_CURRENT);
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for (cnt = 2; cnt < argc; ++cnt)
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{
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int fd = open (argv[cnt], O_RDONLY);
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Elf *elf = elf_begin (fd, mmap ? ELF_C_READ_MMAP : ELF_C_READ, NULL);
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if (elf == NULL)
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{
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printf ("%s not usable %s\n", argv[cnt], elf_errmsg (-1));
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result = 1;
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close (fd);
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continue;
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}
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/* To get the section names. */
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size_t strndx;
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elf_getshdrstrndx (elf, &strndx);
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Elf_Scn *scn = NULL;
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while ((scn = elf_nextscn (elf, scn)) != NULL)
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{
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size_t idx = elf_ndxscn (scn);
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GElf_Shdr mem;
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GElf_Shdr *shdr = gelf_getshdr (scn, &mem);
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const char *name = elf_strptr (elf, strndx, shdr->sh_name);
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if ((shdr->sh_flags & SHF_COMPRESSED) != 0)
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{
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/* Real compressed section. */
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if (elf_compress (scn, 0, 0) < 0)
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{
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printf ("elf_compress failed for section %zd: %s\n",
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idx, elf_errmsg (-1));
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return -1;
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}
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Elf_Data *d = elf_getdata (scn, NULL);
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printf ("%zd: %s, ELF compressed, size: %zx\n",
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idx, name, d->d_size);
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}
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else
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{
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/* Maybe an old GNU compressed .z section? */
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if (name[0] == '.' && name[1] == 'z')
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{
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if (elf_compress_gnu (scn, 0, 0) < 0)
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{
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printf ("elf_compress_gnu failed for section %zd: %s\n",
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idx, elf_errmsg (-1));
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return -1;
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}
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Elf_Data *d = elf_getdata (scn, NULL);
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printf ("%zd: %s, GNU compressed, size: %zx\n",
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idx, name, d->d_size);
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}
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else
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printf ("%zd: %s, NOT compressed\n", idx, name);
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}
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}
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elf_end (elf);
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close (fd);
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}
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return result;
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}
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