mirror of
https://github.com/autc04/Retro68.git
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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* Copyright (C) 2012 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 <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <gelf.h>
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#include <libelf.h>
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#include <stdbool.h>
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#include <inttypes.h>
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int
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main (int argc, char *argv[])
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{
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if (argc != 3)
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{
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fprintf (stderr, "Needs two arguments.\n");
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fprintf (stderr, "First needs to be 'READ', 'MMAP' or 'FDREAD'\n");
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fprintf (stderr, "Second is the ELF file to read.\n");
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exit (2); /* user error */
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}
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bool do_mmap = false;
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bool close_fd = false;
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if (strcmp (argv[1], "READ") == 0)
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{
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do_mmap = false;
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close_fd = false;
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}
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else if (strcmp (argv[1], "MMAP") == 0)
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{
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do_mmap = true;
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close_fd = false;
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}
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else if (strcmp (argv[1], "FDREAD") == 0)
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{
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do_mmap = false;
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close_fd = true;
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}
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else
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{
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fprintf (stderr, "First arg needs to be 'READ', 'MMAP' or 'FDREAD'\n");
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exit (2); /* user error */
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}
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elf_version (EV_CURRENT);
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int fd = open (argv[2], O_RDONLY);
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if (fd < 0)
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{
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fprintf (stderr, "Cannot open input file %s: %s\n", argv[2],
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strerror (errno));
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exit (2);
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}
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Elf *elf = elf_begin (fd, do_mmap ? ELF_C_READ_MMAP : ELF_C_READ, NULL);
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if (elf == NULL)
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{
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fprintf (stderr, "elf_begin failed for %s: %s\n", argv[2],
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elf_errmsg (-1));
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exit (2);
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}
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if (! do_mmap && close_fd)
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{
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if (elf_cntl (elf, ELF_C_FDREAD) < 0)
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{
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fprintf (stderr, "elf_cntl failed for %s: %s\n", argv[2],
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elf_errmsg (-1));
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exit (1);
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}
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close (fd);
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}
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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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GElf_Shdr shdr_mem;
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GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
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printf ("Section at offset %#0" PRIx64 "\n", shdr->sh_offset);
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}
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elf_end (elf);
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exit (0);
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}
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