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108 lines
2.8 KiB
108 lines
2.8 KiB
/* Get ELF header. |
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Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2015 Red Hat, Inc. |
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This file is part of elfutils. |
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Written by Ulrich Drepper <drepper@redhat.com>, 1998. |
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This file is free software; you can redistribute it and/or modify |
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it under the terms of either |
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* the GNU Lesser General Public License as published by the Free |
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Software Foundation; either version 3 of the License, or (at |
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your option) any later version |
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or |
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* the GNU General Public License as published by the Free |
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Software Foundation; either version 2 of the License, or (at |
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your option) any later version |
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or both in parallel, as here. |
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elfutils is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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You should have received copies of the GNU General Public License and |
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the GNU Lesser General Public License along with this program. If |
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not, see <http://www.gnu.org/licenses/>. */ |
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#ifdef HAVE_CONFIG_H |
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# include <config.h> |
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#endif |
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#include <gelf.h> |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "libelfP.h" |
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GElf_Ehdr * |
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internal_function |
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__gelf_getehdr_rdlock (Elf *elf, GElf_Ehdr *dest) |
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{ |
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GElf_Ehdr *result = NULL; |
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if (elf == NULL) |
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return NULL; |
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if (unlikely (elf->kind != ELF_K_ELF)) |
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{ |
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__libelf_seterrno (ELF_E_INVALID_HANDLE); |
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return NULL; |
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} |
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/* The following is an optimization: the ehdr element is at the same |
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position in both the elf32 and elf64 structure. */ |
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if (offsetof (struct Elf, state.elf32.ehdr) |
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!= offsetof (struct Elf, state.elf64.ehdr)) |
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abort (); |
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/* Just pick one of the values. */ |
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if (unlikely (elf->state.elf64.ehdr == NULL)) |
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/* Maybe no ELF header was created yet. */ |
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__libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); |
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else if (elf->class == ELFCLASS32) |
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{ |
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Elf32_Ehdr *ehdr = elf->state.elf32.ehdr; |
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/* Convert the 32-bit struct to an 64-bit one. */ |
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memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); |
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#define COPY(name) \ |
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dest->name = ehdr->name |
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COPY (e_type); |
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COPY (e_machine); |
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COPY (e_version); |
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COPY (e_entry); |
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COPY (e_phoff); |
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COPY (e_shoff); |
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COPY (e_flags); |
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COPY (e_ehsize); |
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COPY (e_phentsize); |
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COPY (e_phnum); |
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COPY (e_shentsize); |
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COPY (e_shnum); |
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COPY (e_shstrndx); |
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result = dest; |
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} |
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else |
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result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); |
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return result; |
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} |
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GElf_Ehdr * |
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gelf_getehdr (Elf *elf, GElf_Ehdr *dest) |
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{ |
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GElf_Ehdr *result; |
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if (elf == NULL) |
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return NULL; |
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rwlock_rdlock (elf->lock); |
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result = __gelf_getehdr_rdlock (elf, dest); |
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rwlock_unlock (elf->lock); |
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return result; |
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}
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