1 /* Get ELF header. 2 Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 1998. 4 5 This program 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, version 2. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software Foundation, 16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17 18 #ifdef HAVE_CONFIG_H 19 # include <config.h> 20 #endif 21 22 #include <gelf.h> 23 #include <string.h> 24 25 #include "libelfP.h" 26 27 28 GElf_Ehdr * 29 gelf_getehdr (elf, dest) 30 Elf *elf; 31 GElf_Ehdr *dest; 32 { 33 GElf_Ehdr *result = NULL; 34 35 if (elf == NULL) 36 return NULL; 37 38 if (unlikely (elf->kind != ELF_K_ELF)) 39 { 40 __libelf_seterrno (ELF_E_INVALID_HANDLE); 41 return NULL; 42 } 43 44 rwlock_rdlock (elf->lock); 45 46 if (elf->class == ELFCLASS32) 47 { 48 Elf32_Ehdr *ehdr = elf->state.elf32.ehdr; 49 50 /* Maybe no ELF header was created yet. */ 51 if (ehdr == NULL) 52 __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); 53 else 54 { 55 /* Convert the 32-bit struct to an 64-bit one. */ 56 memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); 57 #define COPY(name) \ 58 dest->name = ehdr->name 59 COPY (e_type); 60 COPY (e_machine); 61 COPY (e_version); 62 COPY (e_entry); 63 COPY (e_phoff); 64 COPY (e_shoff); 65 COPY (e_flags); 66 COPY (e_ehsize); 67 COPY (e_phentsize); 68 COPY (e_phnum); 69 COPY (e_shentsize); 70 COPY (e_shnum); 71 COPY (e_shstrndx); 72 73 result = dest; 74 } 75 } 76 else 77 { 78 /* Maybe no ELF header was created yet. */ 79 if (elf->state.elf64.ehdr == NULL) 80 __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); 81 else 82 result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); 83 } 84 85 rwlock_unlock (elf->lock); 86 87 return result; 88 } 89
