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91 lines
2.4 KiB
91 lines
2.4 KiB
/* Create new ELF header. |
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Copyright (C) 1998, 1999, 2000, 2002, 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 <stdlib.h> |
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#include <string.h> |
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#include "libelfP.h" |
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#ifndef LIBELFBITS |
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# define LIBELFBITS 32 |
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#endif |
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ElfW2(LIBELFBITS,Ehdr) * |
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elfw2(LIBELFBITS,newehdr) (Elf *elf) |
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{ |
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ElfW2(LIBELFBITS,Ehdr) *result; |
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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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rwlock_wrlock (elf->lock); |
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if (elf->class == 0) |
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elf->class = ELFW(ELFCLASS,LIBELFBITS); |
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else if (unlikely (elf->class != ELFW(ELFCLASS,LIBELFBITS))) |
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{ |
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__libelf_seterrno (ELF_E_INVALID_CLASS); |
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result = NULL; |
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goto out; |
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} |
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/* Don't create an ELF header if one already exists. */ |
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if (elf->state.ELFW(elf,LIBELFBITS).ehdr == NULL) |
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{ |
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/* We use the memory in the ELF descriptor. */ |
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elf->state.ELFW(elf,LIBELFBITS).ehdr = |
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&elf->state.ELFW(elf,LIBELFBITS).ehdr_mem; |
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/* We clear this memory. */ |
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memset (elf->state.ELFW(elf,LIBELFBITS).ehdr, '\0', |
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sizeof (ElfW2(LIBELFBITS,Ehdr))); |
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/* Mark the ELF header has modified. */ |
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elf->state.ELFW(elf,LIBELFBITS).ehdr_flags |= ELF_F_DIRTY; |
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} |
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result = elf->state.ELFW(elf,LIBELFBITS).ehdr; |
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out: |
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rwlock_unlock (elf->lock); |
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return result; |
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} |
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INTDEF(elfw2(LIBELFBITS,newehdr))
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