mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-19 19:43:34 -04:00
Ulrich Drepper
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/* Test program for elf_update function.
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Copyright (C) 2000, 2002, 2005 Red Hat, Inc.
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This file is part of Red Hat elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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Red Hat elfutils 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 the
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Free Software Foundation; version 2 of the License.
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Red Hat 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 GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with Red Hat elfutils; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
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Red Hat elfutils is an included package of the Open Invention Network.
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An included package of the Open Invention Network is a package for which
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Open Invention Network licensees cross-license their patents. No patent
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license is granted, either expressly or impliedly, by designation as an
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included package. Should you wish to participate in the Open Invention
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Network licensing program, please visit www.openinventionnetwork.com
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<http://www.openinventionnetwork.com>. */
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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 <errno.h>
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#include <fcntl.h>
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#include <libelf.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int
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main (int argc, char *argv[] __attribute__ ((unused)))
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{
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const char *fname = "xxx";
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int fd;
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Elf *elf;
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Elf32_Ehdr *ehdr;
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int i;
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fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666);
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if (fd == -1)
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{
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printf ("cannot open `%s': %s\n", fname, strerror (errno));
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exit (1);
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}
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elf_version (EV_CURRENT);
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elf = elf_begin (fd, ELF_C_WRITE, NULL);
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if (elf == NULL)
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{
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printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1));
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exit (1);
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}
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/* Create an ELF header. */
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ehdr = elf32_newehdr (elf);
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if (ehdr == NULL)
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{
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printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
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exit (1);
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}
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/* Print the ELF header values. */
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if (argc > 1)
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{
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for (i = 0; i < EI_NIDENT; ++i)
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printf (" %02x", ehdr->e_ident[i]);
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printf ("\
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\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
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"shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
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"phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
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ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
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ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
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ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
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ehdr->e_shnum, ehdr->e_shstrndx);
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}
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ehdr->e_ident[0] = 42;
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ehdr->e_ident[4] = 1;
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ehdr->e_ident[5] = 1;
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ehdr->e_ident[6] = 2;
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ehdr->e_ident[9] = 2;
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ehdr->e_version = 1;
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ehdr->e_ehsize = 1;
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/* Write out the file. */
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if (elf_update (elf, ELF_C_WRITE) < 0)
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{
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printf ("failure in elf_update: %s\n", elf_errmsg (-1));
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exit (1);
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}
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/* Create an ELF header. */
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ehdr = elf32_newehdr (elf);
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if (ehdr == NULL)
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{
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printf ("cannot create ELF header: %s\n", elf_errmsg (-1));
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exit (1);
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}
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/* Print the ELF header values. */
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if (argc > 1)
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{
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for (i = 0; i < EI_NIDENT; ++i)
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printf (" %02x", ehdr->e_ident[i]);
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printf ("\
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\ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n"
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"shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n"
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"phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n",
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ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry,
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ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize,
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ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize,
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ehdr->e_shnum, ehdr->e_shstrndx);
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}
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if (elf_end (elf) != 0)
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{
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printf ("failure in elf_end: %s\n", elf_errmsg (-1));
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exit (1);
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}
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return 0;
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}
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