/* $NetBSD: libelf_fsize.m4,v 1.3 2009/12/19 07:31:44 thorpej Exp $ */ /*- * 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 1.2.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $ */ #include #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', `#if $3 [ELF_T_$1] = { .fsz32 = $1_SIZE32, .fsz64 = $1_SIZE64 }, #endif') define(`FSIZES', `ifelse($#,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); }