1/* $NetBSD: gelf_ehdr.c,v 1.4 2010/02/22 10:48:32 darran Exp $ */ 2 3/*- 4 * Copyright (c) 2006 Joseph Koshy 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#if HAVE_NBTOOL_CONFIG_H 30# include "nbtool_config.h" 31#endif 32 33#include <sys/cdefs.h> 34/* __FBSDID("$FreeBSD: src/lib/libelf/gelf_ehdr.c,v 1.1.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $"); */ 35 36#include <assert.h> 37#include <limits.h> 38#include <gelf.h> 39#include <libelf.h> 40#include <string.h> 41 42#include "_libelf.h" 43 44Elf32_Ehdr * 45elf32_getehdr(Elf *e) 46{ 47 return (_libelf_ehdr(e, ELFCLASS32, 0)); 48} 49 50Elf64_Ehdr * 51elf64_getehdr(Elf *e) 52{ 53 return (_libelf_ehdr(e, ELFCLASS64, 0)); 54} 55 56GElf_Ehdr * 57gelf_getehdr(Elf *e, GElf_Ehdr *d) 58{ 59 int ec; 60 Elf32_Ehdr *eh32; 61 Elf64_Ehdr *eh64; 62 63 if (d == NULL || e == NULL || 64 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { 65 LIBELF_SET_ERROR(ARGUMENT, 0); 66 return (NULL); 67 } 68 69 if (ec == ELFCLASS32) { 70 if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL) 71 return (NULL); 72 73 (void) memcpy(d->e_ident, eh32->e_ident, sizeof(eh32->e_ident)); 74 d->e_type = eh32->e_type; 75 d->e_machine = eh32->e_machine; 76 d->e_version = eh32->e_version; 77 d->e_entry = eh32->e_entry; 78 d->e_phoff = eh32->e_phoff; 79 d->e_shoff = eh32->e_shoff; 80 d->e_flags = eh32->e_flags; 81 d->e_ehsize = eh32->e_ehsize; 82 d->e_phentsize = eh32->e_phentsize; 83 d->e_phnum = eh32->e_phnum; 84 d->e_shentsize = eh32->e_shentsize; 85 d->e_shnum = eh32->e_shnum; 86 d->e_shstrndx = eh32->e_shstrndx; 87 88 return (d); 89 } 90 91 assert(ec == ELFCLASS64); 92 93 if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL) 94 return (NULL); 95 *d = *eh64; 96 97 return (d); 98} 99 100Elf32_Ehdr * 101elf32_newehdr(Elf *e) 102{ 103 return (_libelf_ehdr(e, ELFCLASS32, 1)); 104} 105 106Elf64_Ehdr * 107elf64_newehdr(Elf *e) 108{ 109 return (_libelf_ehdr(e, ELFCLASS64, 1)); 110} 111 112void * 113gelf_newehdr(Elf *e, int ec) 114{ 115 if (e != NULL && 116 (ec == ELFCLASS32 || ec == ELFCLASS64)) 117 return (_libelf_ehdr(e, ec, 1)); 118 119 LIBELF_SET_ERROR(ARGUMENT, 0); 120 return (NULL); 121} 122 123int 124gelf_update_ehdr(Elf *e, GElf_Ehdr *s) 125{ 126 int ec; 127 void *ehdr; 128 Elf32_Ehdr *eh32; 129 Elf64_Ehdr *eh64; 130 131 if (s== NULL || e == NULL || e->e_kind != ELF_K_ELF || 132 ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) { 133 LIBELF_SET_ERROR(ARGUMENT, 0); 134 return (0); 135 } 136 137 if (e->e_cmd == ELF_C_READ) { 138 LIBELF_SET_ERROR(MODE, 0); 139 return (0); 140 } 141 142 if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL) 143 return (0); 144 145 if (ec == ELFCLASS64) { 146 eh64 = (Elf64_Ehdr *) ehdr; 147 *eh64 = *s; 148 return (1); 149 } 150 151 eh32 = (Elf32_Ehdr *) ehdr; 152 153 (void) memcpy(eh32->e_ident, s->e_ident, sizeof(eh32->e_ident)); 154 155 eh32->e_type = s->e_type; 156 eh32->e_machine = s->e_machine; 157 eh32->e_version = s->e_version; 158 LIBELF_COPY_U32(eh32, s, e_entry); 159 LIBELF_COPY_U32(eh32, s, e_phoff); 160 LIBELF_COPY_U32(eh32, s, e_shoff); 161 eh32->e_flags = s->e_flags; 162 eh32->e_ehsize = s->e_ehsize; 163 eh32->e_phentsize = s->e_phentsize; 164 eh32->e_phnum = s->e_phnum; 165 eh32->e_shentsize = s->e_shentsize; 166 eh32->e_shnum = s->e_shnum; 167 eh32->e_shstrndx = s->e_shstrndx; 168 169 (void) elf_flagehdr(e, ELF_C_SET, ELF_F_DIRTY); 170 171 return (1); 172} 173