168 lines
4.1 KiB
C
168 lines
4.1 KiB
C
/*-
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* Copyright (c) 2006 Joseph Koshy
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/limits.h>
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#include <assert.h>
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#include <gelf.h>
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#include <libelf.h>
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#include <string.h>
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#include "_libelf.h"
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Elf32_Ehdr *
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elf32_getehdr(Elf *e)
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{
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return (_libelf_ehdr(e, ELFCLASS32, 0));
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}
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Elf64_Ehdr *
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elf64_getehdr(Elf *e)
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{
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return (_libelf_ehdr(e, ELFCLASS64, 0));
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}
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GElf_Ehdr *
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gelf_getehdr(Elf *e, GElf_Ehdr *d)
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{
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int ec;
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Elf32_Ehdr *eh32;
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Elf64_Ehdr *eh64;
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if (d == NULL || e == NULL ||
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((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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if (ec == ELFCLASS32) {
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if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL)
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return (NULL);
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(void) memcpy(d->e_ident, eh32->e_ident, sizeof(eh32->e_ident));
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d->e_type = eh32->e_type;
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d->e_machine = eh32->e_machine;
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d->e_version = eh32->e_version;
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d->e_entry = eh32->e_entry;
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d->e_phoff = eh32->e_phoff;
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d->e_shoff = eh32->e_shoff;
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d->e_flags = eh32->e_flags;
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d->e_ehsize = eh32->e_ehsize;
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d->e_phentsize = eh32->e_phentsize;
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d->e_phnum = eh32->e_phnum;
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d->e_shentsize = eh32->e_shentsize;
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d->e_shnum = eh32->e_shnum;
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d->e_shstrndx = eh32->e_shstrndx;
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return (d);
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}
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assert(ec == ELFCLASS64);
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if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL)
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return (NULL);
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*d = *eh64;
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return (d);
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}
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Elf32_Ehdr *
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elf32_newehdr(Elf *e)
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{
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return (_libelf_ehdr(e, ELFCLASS32, 1));
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}
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Elf64_Ehdr *
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elf64_newehdr(Elf *e)
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{
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return (_libelf_ehdr(e, ELFCLASS64, 1));
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}
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void *
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gelf_newehdr(Elf *e, int ec)
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{
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if (e != NULL &&
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(ec == ELFCLASS32 || ec == ELFCLASS64))
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return (_libelf_ehdr(e, ec, 1));
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (NULL);
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}
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int
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gelf_update_ehdr(Elf *e, GElf_Ehdr *s)
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{
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int ec;
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void *ehdr;
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Elf32_Ehdr *eh32;
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Elf64_Ehdr *eh64;
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if (s== NULL || e == NULL || e->e_kind != ELF_K_ELF ||
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((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
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LIBELF_SET_ERROR(ARGUMENT, 0);
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return (0);
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}
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if (e->e_cmd == ELF_C_READ) {
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LIBELF_SET_ERROR(MODE, 0);
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return (0);
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}
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if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
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return (0);
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if (ec == ELFCLASS64) {
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eh64 = (Elf64_Ehdr *) ehdr;
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*eh64 = *s;
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return (1);
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}
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eh32 = (Elf32_Ehdr *) ehdr;
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(void) memcpy(eh32->e_ident, s->e_ident, sizeof(eh32->e_ident));
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eh32->e_type = s->e_type;
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eh32->e_machine = s->e_machine;
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eh32->e_version = s->e_version;
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LIBELF_COPY_U32(eh32, s, e_entry);
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LIBELF_COPY_U32(eh32, s, e_phoff);
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LIBELF_COPY_U32(eh32, s, e_shoff);
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eh32->e_flags = s->e_flags;
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eh32->e_ehsize = s->e_ehsize;
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eh32->e_phentsize = s->e_phentsize;
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eh32->e_phnum = s->e_phnum;
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eh32->e_shentsize = s->e_shentsize;
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eh32->e_shnum = s->e_shnum;
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eh32->e_shstrndx = s->e_shstrndx;
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(void) elf_flagehdr(e, ELF_C_SET, ELF_F_DIRTY);
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return (1);
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}
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