1 /* Copyright (C) 2002, 2005 Red Hat, Inc. 2 This file is part of elfutils. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 elfutils is distributed in the hope that it will be useful, but 11 WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #ifdef HAVE_CONFIG_H 19 # include <config.h> 20 #endif 21 22 #include <errno.h> 23 #include <error.h> 24 #include <fcntl.h> 25 #include <gelf.h> 26 #include <stdlib.h> 27 #include <unistd.h> 28 29 int 30 main (int argc, char *argv[]) 31 { 32 if (argc < 3) 33 error (EXIT_FAILURE, 0, "usage: %s FROMNAME TONAME", argv[0]); 34 35 elf_version (EV_CURRENT); 36 37 int infd = open (argv[1], O_RDONLY); 38 if (infd == -1) 39 error (EXIT_FAILURE, errno, "cannot open input file '%s'", argv[1]); 40 41 Elf *inelf = elf_begin (infd, ELF_C_READ, NULL); 42 if (inelf == NULL) 43 error (EXIT_FAILURE, 0, "problems opening '%s' as ELF file: %s", 44 argv[1], elf_errmsg (-1)); 45 46 int outfd = creat (argv[2], 0666); 47 if (outfd == -1) 48 error (EXIT_FAILURE, errno, "cannot open output file '%s'", argv[2]); 49 50 Elf *outelf = elf_begin (outfd, ELF_C_WRITE, NULL); 51 if (outelf == NULL) 52 error (EXIT_FAILURE, 0, "problems opening '%s' as ELF file: %s", 53 argv[2], elf_errmsg (-1)); 54 55 gelf_newehdr (outelf, gelf_getclass (inelf)); 56 57 GElf_Ehdr ehdr_mem; 58 GElf_Ehdr *ehdr; 59 gelf_update_ehdr (outelf, (ehdr = gelf_getehdr (inelf, &ehdr_mem))); 60 61 if (ehdr->e_phnum > 0) 62 { 63 int cnt; 64 65 if (gelf_newphdr (outelf, ehdr->e_phnum) == 0) 66 error (EXIT_FAILURE, 0, "cannot create program header: %s", 67 elf_errmsg (-1)); 68 69 for (cnt = 0; cnt < ehdr->e_phnum; ++cnt) 70 { 71 GElf_Phdr phdr_mem; 72 73 gelf_update_phdr (outelf, cnt, gelf_getphdr (inelf, cnt, &phdr_mem)); 74 } 75 } 76 77 Elf_Scn *scn = NULL; 78 while ((scn = elf_nextscn (inelf, scn)) != NULL) 79 { 80 Elf_Scn *newscn = elf_newscn (outelf); 81 82 GElf_Shdr shdr_mem; 83 gelf_update_shdr (newscn, gelf_getshdr (scn, &shdr_mem)); 84 85 *elf_newdata (newscn) = *elf_getdata (scn, NULL); 86 } 87 88 elf_flagelf (outelf, ELF_C_SET, ELF_F_LAYOUT); 89 90 if (elf_update (outelf, ELF_C_WRITE) == -1) 91 error (EXIT_FAILURE, 0, "elf_update failed: %s", elf_errmsg (-1)); 92 93 elf_end (outelf); 94 close (outfd); 95 96 elf_end (inelf); 97 98 return 0; 99 } 100
