1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020 The FreeBSD Foundation 5 * 6 * This software was developed by Tiger Gao under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are 11 * met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <assert.h> 32 #include <gelf.h> 33 #include <libelf.h> 34 #include <limits.h> 35 #include <stdint.h> 36 37 #include "_libelf.h" 38 39 Elf32_Chdr * 40 elf32_getchdr(Elf_Scn *s) 41 { 42 return (_libelf_getchdr(s, ELFCLASS32)); 43 } 44 45 Elf64_Chdr * 46 elf64_getchdr(Elf_Scn *s) 47 { 48 return (_libelf_getchdr(s, ELFCLASS64)); 49 } 50 51 GElf_Chdr * 52 gelf_getchdr(Elf_Scn *s, GElf_Chdr *d) 53 { 54 int ec; 55 void *ch; 56 Elf32_Chdr *ch32; 57 Elf64_Chdr *ch64; 58 59 if (d == NULL) { 60 LIBELF_SET_ERROR(ARGUMENT, 0); 61 return (NULL); 62 } 63 64 if ((ch = _libelf_getchdr(s, ELFCLASSNONE)) == NULL) 65 return (NULL); 66 67 ec = s->s_elf->e_class; 68 assert(ec == ELFCLASS32 || ec == ELFCLASS64); 69 70 if (ec == ELFCLASS32) { 71 ch32 = (Elf32_Chdr *)ch; 72 73 d->ch_type = (Elf64_Word)ch32->ch_type; 74 d->ch_size = (Elf64_Xword)ch32->ch_size; 75 d->ch_addralign = (Elf64_Xword)ch32->ch_addralign; 76 } else { 77 ch64 = (Elf64_Chdr *)ch; 78 *d = *ch64; 79 } 80 81 return (d); 82 } 83