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/*-
* Copyright (c) 2011 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.
*/
#include <ar.h>
#include <assert.h>
#include <string.h>
#include <libelf.h>
#include "_libelf.h"
ELFTC_VCSID("$Id: libelf_memory.c,v 1.3 2020/05/18 06:46:23 jsg Exp $");
/*
* Create an ELF descriptor for a memory image, optionally reporting
* parse errors.
*/
Elf *
_libelf_memory(unsigned char *image, size_t sz, int reporterror)
{
Elf *e;
int e_class;
enum Elf_Error error;
unsigned int e_byteorder, e_version;
assert(image != NULL);
assert(sz > 0);
if ((e = _libelf_allocate_elf()) == NULL)
return (NULL);
e->e_cmd = ELF_C_READ;
e->e_rawfile = image;
e->e_rawsize = (off_t) sz;
#undef LIBELF_IS_ELF
#define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \
(P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \
(P)[EI_MAG3] == ELFMAG3)
if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) {
e_byteorder = image[EI_DATA];
e_class = image[EI_CLASS];
e_version = image[EI_VERSION];
error = ELF_E_NONE;
if (e_version > EV_CURRENT)
error = ELF_E_VERSION;
else if ((e_byteorder != ELFDATA2LSB && e_byteorder !=
ELFDATA2MSB) || (e_class != ELFCLASS32 && e_class !=
ELFCLASS64))
error = ELF_E_HEADER;
if (error != ELF_E_NONE) {
if (reporterror) {
LIBELF_PRIVATE(error) = LIBELF_ERROR(error, 0);
_libelf_release_elf(e);
return (NULL);
}
} else {
_libelf_init_elf(e, ELF_K_ELF);
e->e_byteorder = e_byteorder;
e->e_class = e_class;
e->e_version = e_version;
}
} else if (sz >= SARMAG &&
strncmp((const char *) image, ARMAG, (size_t) SARMAG) == 0)
return (_libelf_ar_open(e, reporterror));
return (e);
}
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