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1 : : /* Get ELF header. 2 : : Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2015 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : Written by Ulrich Drepper <drepper@redhat.com>, 1998. 5 : : 6 : : This file is free software; you can redistribute it and/or modify 7 : : it under the terms of either 8 : : 9 : : * the GNU Lesser General Public License as published by the Free 10 : : Software Foundation; either version 3 of the License, or (at 11 : : your option) any later version 12 : : 13 : : or 14 : : 15 : : * the GNU General Public License as published by the Free 16 : : Software Foundation; either version 2 of the License, or (at 17 : : your option) any later version 18 : : 19 : : or both in parallel, as here. 20 : : 21 : : elfutils is distributed in the hope that it will be useful, but 22 : : WITHOUT ANY WARRANTY; without even the implied warranty of 23 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 : : General Public License for more details. 25 : : 26 : : You should have received copies of the GNU General Public License and 27 : : the GNU Lesser General Public License along with this program. If 28 : : not, see <http://www.gnu.org/licenses/>. */ 29 : : 30 : : #ifdef HAVE_CONFIG_H 31 : : # include <config.h> 32 : : #endif 33 : : 34 : : #include <gelf.h> 35 : : #include <stddef.h> 36 : : #include <stdlib.h> 37 : : #include <string.h> 38 : : 39 : : #include "libelfP.h" 40 : : 41 : : 42 : : GElf_Ehdr * 43 : : internal_function 44 : 3305187 : __gelf_getehdr_rdlock (Elf *elf, GElf_Ehdr *dest) 45 : : { 46 : 3305187 : GElf_Ehdr *result = NULL; 47 : : 48 [ - + ]: 3305187 : if (elf == NULL) 49 : : return NULL; 50 : : 51 [ - + ]: 3305187 : if (unlikely (elf->kind != ELF_K_ELF)) 52 : : { 53 : 0 : __libelf_seterrno (ELF_E_INVALID_HANDLE); 54 : 0 : return NULL; 55 : : } 56 : : 57 : : /* The following is an optimization: the ehdr element is at the same 58 : : position in both the elf32 and elf64 structure. */ 59 : 3305187 : if (offsetof (struct Elf, state.elf32.ehdr) 60 : : != offsetof (struct Elf, state.elf64.ehdr)) 61 : : abort (); 62 : : /* Just pick one of the values. */ 63 [ - + ]: 3305187 : if (unlikely (elf->state.elf64.ehdr == NULL)) 64 : : /* Maybe no ELF header was created yet. */ 65 : 0 : __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); 66 [ + + ]: 3305187 : else if (elf->class == ELFCLASS32) 67 : : { 68 : 2049524 : Elf32_Ehdr *ehdr = elf->state.elf32.ehdr; 69 : : 70 : : /* Convert the 32-bit struct to an 64-bit one. */ 71 : 2049524 : memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); 72 : : #define COPY(name) \ 73 : : dest->name = ehdr->name 74 : 2049524 : COPY (e_type); 75 : 2049524 : COPY (e_machine); 76 : 2049524 : COPY (e_version); 77 : 2049524 : COPY (e_entry); 78 : 2049524 : COPY (e_phoff); 79 : 2049524 : COPY (e_shoff); 80 : 2049524 : COPY (e_flags); 81 : 2049524 : COPY (e_ehsize); 82 : 2049524 : COPY (e_phentsize); 83 : 2049524 : COPY (e_phnum); 84 : 2049524 : COPY (e_shentsize); 85 : 2049524 : COPY (e_shnum); 86 : 2049524 : COPY (e_shstrndx); 87 : : 88 : 2049524 : result = dest; 89 : : } 90 : : else 91 : 1255663 : result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); 92 : : 93 : : return result; 94 : : } 95 : : 96 : : GElf_Ehdr * 97 : 1153968 : gelf_getehdr (Elf *elf, GElf_Ehdr *dest) 98 : : { 99 : 1153968 : GElf_Ehdr *result; 100 [ + - ]: 1153968 : if (elf == NULL) 101 : : return NULL; 102 : : 103 : 1153968 : rwlock_rdlock (elf->lock); 104 : 1153968 : result = __gelf_getehdr_rdlock (elf, dest); 105 : 1153968 : rwlock_unlock (elf->lock); 106 : : 107 : 1153968 : return result; 108 : : }