/*      $NetBSD: gelf_ehdr.c,v 1.5 2024/03/03 17:37:34 christos Exp $   */

/*-
* Copyright (c) 2006,2008 Joseph Koshy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#if HAVE_NBTOOL_CONFIG_H
# include "nbtool_config.h"
#endif

#include <sys/cdefs.h>

#include <assert.h>
#include <gelf.h>
#include <libelf.h>
#include <limits.h>
#include <stdint.h>
#include <string.h>

#include "_libelf.h"

__RCSID("$NetBSD: gelf_ehdr.c,v 1.5 2024/03/03 17:37:34 christos Exp $");
ELFTC_VCSID("Id: gelf_ehdr.c 3977 2022-05-01 06:45:34Z jkoshy");

Elf32_Ehdr *
elf32_getehdr(Elf *e)
{
       return (_libelf_ehdr(e, ELFCLASS32, 0));
}

Elf64_Ehdr *
elf64_getehdr(Elf *e)
{
       return (_libelf_ehdr(e, ELFCLASS64, 0));
}

GElf_Ehdr *
gelf_getehdr(Elf *e, GElf_Ehdr *d)
{
       int ec;
       Elf32_Ehdr *eh32;
       Elf64_Ehdr *eh64;

       if (d == NULL || e == NULL ||
           ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
               LIBELF_SET_ERROR(ARGUMENT, 0);
               return (NULL);
       }

       if (ec == ELFCLASS32) {
               if ((eh32 = _libelf_ehdr(e, ELFCLASS32, 0)) == NULL)
                       return (NULL);

               (void) memcpy(d->e_ident, eh32->e_ident,
                   sizeof(eh32->e_ident));
               d->e_type               = eh32->e_type;
               d->e_machine            = eh32->e_machine;
               d->e_version            = eh32->e_version;
               d->e_entry              = eh32->e_entry;
               d->e_phoff              = eh32->e_phoff;
               d->e_shoff              = eh32->e_shoff;
               d->e_flags              = eh32->e_flags;
               d->e_ehsize             = eh32->e_ehsize;
               d->e_phentsize          = eh32->e_phentsize;
               d->e_phnum              = eh32->e_phnum;
               d->e_shentsize          = eh32->e_shentsize;
               d->e_shnum              = eh32->e_shnum;
               d->e_shstrndx           = eh32->e_shstrndx;

               return (d);
       }

       assert(ec == ELFCLASS64);

       if ((eh64 = _libelf_ehdr(e, ELFCLASS64, 0)) == NULL)
               return (NULL);
       *d = *eh64;

       return (d);
}

Elf32_Ehdr *
elf32_newehdr(Elf *e)
{
       return (_libelf_ehdr(e, ELFCLASS32, 1));
}

Elf64_Ehdr *
elf64_newehdr(Elf *e)
{
       return (_libelf_ehdr(e, ELFCLASS64, 1));
}

void *
gelf_newehdr(Elf *e, int ec)
{
       if (e != NULL &&
           (ec == ELFCLASS32 || ec == ELFCLASS64))
               return (_libelf_ehdr(e, ec, 1));

       LIBELF_SET_ERROR(ARGUMENT, 0);
       return (NULL);
}

int
gelf_update_ehdr(Elf *e, GElf_Ehdr *s)
{
       int ec;
       void *ehdr;
       Elf32_Ehdr *eh32;
       Elf64_Ehdr *eh64;

       if (s== NULL || e == NULL || e->e_kind != ELF_K_ELF ||
           ((ec = e->e_class) != ELFCLASS32 && ec != ELFCLASS64)) {
               LIBELF_SET_ERROR(ARGUMENT, 0);
               return (0);
       }

       if (e->e_cmd == ELF_C_READ) {
               LIBELF_SET_ERROR(MODE, 0);
               return (0);
       }

       if ((ehdr = _libelf_ehdr(e, ec, 0)) == NULL)
               return (0);

       (void) elf_flagehdr(e, ELF_C_SET, ELF_F_DIRTY);

       if (ec == ELFCLASS64) {
               eh64 = (Elf64_Ehdr *) ehdr;
               *eh64 = *s;
               return (1);
       }

       eh32 = (Elf32_Ehdr *) ehdr;

       (void) memcpy(eh32->e_ident, s->e_ident, sizeof(eh32->e_ident));

       eh32->e_type      = s->e_type;
       eh32->e_machine   = s->e_machine;
       eh32->e_version   = s->e_version;
       LIBELF_COPY_U32(eh32, s, e_entry);
       LIBELF_COPY_U32(eh32, s, e_phoff);
       LIBELF_COPY_U32(eh32, s, e_shoff);
       eh32->e_flags     = s->e_flags;
       eh32->e_ehsize    = s->e_ehsize;
       eh32->e_phentsize = s->e_phentsize;
       eh32->e_phnum     = s->e_phnum;
       eh32->e_shentsize = s->e_shentsize;
       eh32->e_shnum     = s->e_shnum;
       eh32->e_shstrndx  = s->e_shstrndx;

       return (1);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.