d003e0d7fe
This contains many small bugfixes and documentation improvements. Sponsored by: The FreeBSD Foundation
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/*-
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* Copyright (c) 2011 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 <ar.h>
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#include <assert.h>
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#include <string.h>
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#include <libelf.h>
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#include "_libelf.h"
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ELFTC_VCSID("$Id: libelf_memory.c 3738 2019-05-05 21:49:06Z jkoshy $");
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/*
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* Create an ELF descriptor for a memory image, optionally reporting
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* parse errors.
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*/
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Elf *
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_libelf_memory(unsigned char *image, size_t sz, int reporterror)
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{
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Elf *e;
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int e_class;
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enum Elf_Error error;
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unsigned int e_byteorder, e_version;
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assert(image != NULL);
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assert(sz > 0);
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if ((e = _libelf_allocate_elf()) == NULL)
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return (NULL);
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e->e_cmd = ELF_C_READ;
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e->e_rawfile = image;
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e->e_rawsize = (off_t) sz;
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#undef LIBELF_IS_ELF
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#define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \
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(P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \
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(P)[EI_MAG3] == ELFMAG3)
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if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) {
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e_byteorder = image[EI_DATA];
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e_class = image[EI_CLASS];
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e_version = image[EI_VERSION];
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error = ELF_E_NONE;
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if (e_version > EV_CURRENT)
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error = ELF_E_VERSION;
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else if ((e_byteorder != ELFDATA2LSB && e_byteorder !=
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ELFDATA2MSB) || (e_class != ELFCLASS32 && e_class !=
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ELFCLASS64))
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error = ELF_E_HEADER;
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if (error != ELF_E_NONE) {
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if (reporterror) {
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LIBELF_PRIVATE(error) = LIBELF_ERROR(error, 0);
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_libelf_release_elf(e);
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return (NULL);
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}
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} else {
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_libelf_init_elf(e, ELF_K_ELF);
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e->e_byteorder = e_byteorder;
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e->e_class = e_class;
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e->e_version = e_version;
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}
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} else if (sz >= SARMAG &&
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strncmp((const char *) image, ARMAG, (size_t) SARMAG) == 0)
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return (_libelf_ar_open(e, reporterror));
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return (e);
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}
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