103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes/* Copyright (C) 2012 Red Hat, Inc. 203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is part of elfutils. 303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is free software; you can redistribute it and/or modify 503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes it under the terms of the GNU General Public License as published by 603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes the Free Software Foundation; either version 3 of the License, or 703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes (at your option) any later version. 803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elfutils is distributed in the hope that it will be useful, but 1003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes WITHOUT ANY WARRANTY; without even the implied warranty of 1103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes GNU General Public License for more details. 1303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes You should have received a copy of the GNU General Public License 1503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes along with this program. If not, see <http://www.gnu.org/licenses/>. */ 1603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <sys/types.h> 1803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <sys/stat.h> 1903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <stdio.h> 2003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <stdlib.h> 2103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <unistd.h> 2203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <errno.h> 2303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <string.h> 2403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <fcntl.h> 2503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <gelf.h> 2603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <libelf.h> 2703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <stdbool.h> 2803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes#include <inttypes.h> 2903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 3003333823c75a1c1887e923828113a1b0fd12020cElliott Hughesint 3103333823c75a1c1887e923828113a1b0fd12020cElliott Hughesmain (int argc, char *argv[]) 3203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes{ 3303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (argc != 3) 3403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 3503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "Needs two arguments.\n"); 3603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "First needs to be 'READ', 'MMAP' or 'FDREAD'\n"); 3703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "Second is the ELF file to read.\n"); 3803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (2); /* user error */ 3903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 4003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 4103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes bool do_mmap = false; 4203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes bool close_fd = false; 4303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (strcmp (argv[1], "READ") == 0) 4403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 4503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes do_mmap = false; 4603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes close_fd = false; 4703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 4803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes else if (strcmp (argv[1], "MMAP") == 0) 4903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 5003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes do_mmap = true; 5103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes close_fd = false; 5203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 5303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes else if (strcmp (argv[1], "FDREAD") == 0) 5403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 5503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes do_mmap = false; 5603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes close_fd = true; 5703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 5803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes else 5903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 6003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "First arg needs to be 'READ', 'MMAP' or 'FDREAD'\n"); 6103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (2); /* user error */ 6203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 6303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 6403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elf_version (EV_CURRENT); 6503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 6603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes int fd = open (argv[2], O_RDONLY); 6703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (fd < 0) 6803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 6903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "Cannot open input file %s: %s\n", argv[2], 7003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes strerror (errno)); 7103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (2); 7203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 7303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 7403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Elf *elf = elf_begin (fd, do_mmap ? ELF_C_READ_MMAP : ELF_C_READ, NULL); 7503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (elf == NULL) 7603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 7703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "elf_begin failed for %s: %s\n", argv[2], 7803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elf_errmsg (-1)); 7903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (2); 8003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 8103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 8203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (! do_mmap && close_fd) 8303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 8403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (elf_cntl (elf, ELF_C_FDREAD) < 0) 8503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 8603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes fprintf (stderr, "elf_cntl failed for %s: %s\n", argv[2], 8703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elf_errmsg (-1)); 8803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (1); 8903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 9003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes close (fd); 9103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 9203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 9303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Elf_Scn *scn = NULL; 9403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes while ((scn = elf_nextscn (elf, scn)) != NULL) 9503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 9603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes GElf_Shdr shdr_mem; 9703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem); 9803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes printf ("Section at offset %#0" PRIx64 "\n", shdr->sh_offset); 9903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 10003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 10103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elf_end (elf); 10203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes exit (0); 10303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes} 104