cf781b2e16
This brings a number of fixes to elfcopy/strip and DWARF4 improvements. Sponsored by: The FreeBSD Foundation
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/*-
|
|
* 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 3013 2014-03-23 06:16:59Z jkoshy $");
|
|
|
|
/*
|
|
* 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 = 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);
|
|
(void) _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);
|
|
}
|