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1cedca8ff4
Based on: c950e8a9 config: Fix spec file, add manpages and new GFDL license. With the following patches: configure: Add --disable-programs configure: Add --disable-shared configure: Fix -D_FORTIFY_SOURCE=2 check when CFLAGS contains -Wno-error libcpu: compile i386_lex.c with -Wno-implicit-fallthrough The plan is to stop relying on the distribution's version of elfutils and instead ship our own. This gives us freedom to assume that we're using the latest version and even ship our own patches (starting with a few build system improvements). More details are in scripts/update-elfutils.sh, which was used to generate this commit.
110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/* Convert from memory to file representation.
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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 <assert.h>
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#include <endian.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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Elf_Data *
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elfw2(LIBELFBITS, xlatetof) (Elf_Data *dest, const Elf_Data *src,
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unsigned int encode)
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{
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/* First test whether the input data is really suitable for this
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type. This means, whether there is an integer number of records.
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Note that for this implementation the memory and file size of the
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data types are identical. */
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size_t recsize = __libelf_type_sizes[ELFW(ELFCLASS,LIBELFBITS) - 1][src->d_type];
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if (src->d_size % recsize != 0)
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{
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__libelf_seterrno (ELF_E_INVALID_DATA);
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return NULL;
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}
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/* Next see whether the converted data fits in the output buffer. */
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if (src->d_size > dest->d_size)
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{
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__libelf_seterrno (ELF_E_DEST_SIZE);
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return NULL;
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}
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/* Test the encode parameter. */
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if (encode != ELFDATA2LSB && encode != ELFDATA2MSB)
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{
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__libelf_seterrno (ELF_E_INVALID_ENCODING);
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return NULL;
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}
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/* Determine the translation function to use.
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At this point we make an assumption which is valid for all
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existing implementations so far: the memory and file sizes are
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the same. This has very important consequences:
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a) The requirement that the source and destination buffer can
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overlap can easily be fulfilled.
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b) We need only one function to convert from and memory to file
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and vice versa since the function only has to copy and/or
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change the byte order.
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*/
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if ((__BYTE_ORDER == __LITTLE_ENDIAN && encode == ELFDATA2LSB)
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|| (__BYTE_ORDER == __BIG_ENDIAN && encode == ELFDATA2MSB))
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{
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/* We simply have to copy since the byte order is the same. */
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if (src->d_buf != dest->d_buf)
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memmove (dest->d_buf, src->d_buf, src->d_size);
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}
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else
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{
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xfct_t fctp;
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fctp = __elf_xfctstom[ELFW(ELFCLASS, LIBELFBITS) - 1][src->d_type];
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/* Do the real work. */
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(*fctp) (dest->d_buf, src->d_buf, src->d_size, 1);
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}
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/* Now set the real destination type and length since the operation was
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successful. */
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dest->d_type = src->d_type;
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dest->d_size = src->d_size;
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return dest;
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}
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INTDEF(elfw2(LIBELFBITS, xlatetof))
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