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/*-
* Copyright (c) 2006 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.
*
* $FreeBSD: src/lib/libelf/libelf_fsize.m4,v 1.2 2006/12/18 05:40:01 jkoshy Exp $
*/
#include "libelf.h"
#include "_libelf.h"
/*
* Create an array of file sizes from the elf_type definitions
*/
divert(-1)
include(SRCDIR`/elf_types.m4')
/*
* Translations from structure definitions to the size of their file
* representations.
*/
/* `Basic' types */
define(`BYTE_SIZE', 1)
define(`IDENT_SIZE', `EI_NIDENT')
define(`NOTE_SIZE', 1) /* Elf_Note structures have variable length. */
/* Currently unimplemented types */
define(`MOVEP_SIZE', 0)
/* Overrides for 32 bit types that do not exist */
define(`XWORD_SIZE32', 0)
define(`SXWORD_SIZE32', 0)
/*
* FSZ{32,64} define the sizes of 32 and 64 bit file structures respectively.
*/
define(`FSZ32',`_FSZ32($1_DEF)')
define(`_FSZ32',
`ifelse($#,1,0,
`_BSZ32($1)+_FSZ32(shift($@))')')
define(`_BSZ32',`$2_SIZE32')
define(`FSZ64',`_FSZ64($1_DEF)')
define(`_FSZ64',
`ifelse($#,1,0,
`_BSZ64($1)+_FSZ64(shift($@))')')
define(`_BSZ64',`$2_SIZE64')
/*
* DEFINE_ELF_FSIZES(TYPE,NAME)
*
* Shorthand for defining for 32 and 64 versions
* of elf type TYPE.
*
* If TYPE`'_SIZE is defined, use its value for both 32 bit and 64 bit
* sizes.
*
* Otherwise, look for a explicit 32/64 bit size definition for TYPE,
* TYPE`'_SIZE32 or TYPE`'_SIZE64. If this definition is present, there
* is nothing further to do.
*
* Otherwise, if an Elf{32,64}_`'NAME structure definition is known,
* compute an expression that adds up the sizes of the structure's
* constituents.
*
* If such a structure definition is not known, treat TYPE as a primitive
* (i.e., integral) type and use sizeof(Elf{32,64}_`'NAME) to get its
* file representation size.
*/
define(`DEFINE_ELF_FSIZE',
`ifdef($1`_SIZE',
`define($1_SIZE32,$1_SIZE)
define($1_SIZE64,$1_SIZE)',
`ifdef($1`_SIZE32',`',
`ifdef(`Elf32_'$2`_DEF',
`define($1_SIZE32,FSZ32(Elf32_$2))',
`define($1_SIZE32,`sizeof(Elf32_'$2`)')')')
ifdef($1`_SIZE64',`',
`ifdef(`Elf64_'$2`_DEF',
`define($1_SIZE64,FSZ64(Elf64_$2))',
`define($1_SIZE64,`sizeof(Elf64_'$2`)')')')')')
define(`DEFINE_ELF_FSIZES',
`ifelse($#,1,`',
`DEFINE_ELF_FSIZE($1)
DEFINE_ELF_FSIZES(shift($@))')')
DEFINE_ELF_FSIZES(ELF_TYPE_LIST)
DEFINE_ELF_FSIZE(`IDENT',`') # `IDENT' is a pseudo type
define(`FSIZE',
`[ELF_T_$1] = { .fsz32 = $1_SIZE32, .fsz64 = $1_SIZE64 },')
define(`FSIZES',
`ifelse($#,1,`',
`FSIZE($1)
FSIZES(shift($@))')')
divert(0)
struct fsize {
size_t fsz32;
size_t fsz64;
};
static struct fsize fsize[ELF_T_NUM] = {
FSIZES(ELF_TYPE_LIST)
};
size_t
_libelf_fsize(Elf_Type t, int ec, unsigned int v, size_t c)
{
size_t sz;
sz = 0;
if (v != EV_CURRENT)
LIBELF_SET_ERROR(VERSION, 0);
else if ((int) t < ELF_T_FIRST || t > ELF_T_LAST)
LIBELF_SET_ERROR(ARGUMENT, 0);
else {
sz = ec == ELFCLASS64 ? fsize[t].fsz64 : fsize[t].fsz32;
if (sz == 0)
LIBELF_SET_ERROR(UNIMPL, 0);
}
return (sz*c);
}
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