89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
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/* Copyright (C) 2002 Red Hat, Inc.
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Written by Ulrich Drepper <drepper@redhat.com>, 2002.
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This program is Open Source software; you can redistribute it and/or
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modify it under the terms of the Open Software License version 1.0 as
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published by the Open Source Initiative.
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You should have received a copy of the Open Software License along
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with this program; if not, you may obtain a copy of the Open Software
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License version 1.0 from http://www.opensource.org/licenses/osl.php or
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by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
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3001 King Ranch Road, Ukiah, CA 95482. */
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <gelf.h>
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#include <stdlib.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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if (argc < 3)
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error (EXIT_FAILURE, 0, "usage: %s FROMNAME TONAME", argv[0]);
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elf_version (EV_CURRENT);
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int infd = open (argv[1], O_RDONLY);
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if (infd == -1)
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error (EXIT_FAILURE, errno, "cannot open input file '%s'", argv[1]);
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Elf *inelf = elf_begin (infd, ELF_C_READ, NULL);
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if (inelf == NULL)
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error (EXIT_FAILURE, 0, "problems opening '%s' as ELF file: %s",
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argv[1], elf_errmsg (-1));
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int outfd = creat (argv[2], 0666);
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if (outfd == -1)
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error (EXIT_FAILURE, errno, "cannot open output file '%s'", argv[2]);
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Elf *outelf = elf_begin (outfd, ELF_C_WRITE, NULL);
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if (outelf == NULL)
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error (EXIT_FAILURE, 0, "problems opening '%s' as ELF file: %s",
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argv[2], elf_errmsg (-1));
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gelf_newehdr (outelf, gelf_getclass (inelf));
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GElf_Ehdr ehdr_mem;
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GElf_Ehdr *ehdr;
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gelf_update_ehdr (outelf, (ehdr = gelf_getehdr (inelf, &ehdr_mem)));
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if (ehdr->e_phnum > 0)
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{
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int cnt;
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if (gelf_newphdr (outelf, ehdr->e_phnum) == 0)
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error (EXIT_FAILURE, 0, "cannot create program header: %s",
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elf_errmsg (-1));
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for (cnt = 0; cnt < ehdr->e_phnum; ++cnt)
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{
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GElf_Phdr phdr_mem;
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gelf_update_phdr (outelf, cnt, gelf_getphdr (inelf, cnt, &phdr_mem));
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}
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}
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Elf_Scn *scn = NULL;
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while ((scn = elf_nextscn (inelf, scn)) != NULL)
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{
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Elf_Scn *newscn = elf_newscn (outelf);
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GElf_Shdr shdr_mem;
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gelf_update_shdr (newscn, gelf_getshdr (scn, &shdr_mem));
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*elf_newdata (newscn) = *elf_getdata (scn, NULL);
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}
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elf_flagelf (outelf, ELF_C_SET, ELF_F_LAYOUT);
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if (elf_update (outelf, ELF_C_WRITE) == -1)
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error (EXIT_FAILURE, 0, "elf_update failed: %s", elf_errmsg (-1));
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close (outfd);
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return 0;
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}
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