138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
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/*-
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* Copyright (c) 2006,2008 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 <sys/cdefs.h>
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#include <sys/types.h>
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#include <libelf.h>
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#include "_libelf.h"
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LIBELF_VCSID("$Id$");
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struct align {
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int a32;
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int a64;
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};
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#ifdef __GNUC__
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#define MALIGN(N) { \
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.a32 = __alignof__(Elf32_##N), \
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.a64 = __alignof__(Elf64_##N) \
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}
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#define MALIGN64(V) { \
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.a32 = 0, \
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.a64 = __alignof__(Elf64_##V) \
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}
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#define MALIGN_WORD() { \
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.a32 = __alignof__(int32_t), \
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.a64 = __alignof__(int64_t) \
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}
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#else
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#error Need the __alignof__ builtin.
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#endif
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#define UNSUPPORTED() { \
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.a32 = 0, \
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.a64 = 0 \
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}
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static struct align malign[ELF_T_NUM] = {
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[ELF_T_ADDR] = MALIGN(Addr),
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[ELF_T_BYTE] = { .a32 = 1, .a64 = 1 },
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[ELF_T_CAP] = MALIGN(Cap),
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[ELF_T_DYN] = MALIGN(Dyn),
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[ELF_T_EHDR] = MALIGN(Ehdr),
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[ELF_T_HALF] = MALIGN(Half),
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[ELF_T_LWORD] = MALIGN(Lword),
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[ELF_T_MOVE] = MALIGN(Move),
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[ELF_T_MOVEP] = UNSUPPORTED(),
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[ELF_T_NOTE] = MALIGN(Nhdr),
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[ELF_T_OFF] = MALIGN(Off),
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[ELF_T_PHDR] = MALIGN(Phdr),
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[ELF_T_REL] = MALIGN(Rel),
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[ELF_T_RELA] = MALIGN(Rela),
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[ELF_T_SHDR] = MALIGN(Shdr),
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[ELF_T_SWORD] = MALIGN(Sword),
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[ELF_T_SXWORD] = MALIGN64(Sxword),
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[ELF_T_SYM] = MALIGN(Sym),
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[ELF_T_SYMINFO] = MALIGN(Syminfo),
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[ELF_T_VDEF] = MALIGN(Verdef),
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[ELF_T_VNEED] = MALIGN(Verneed),
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[ELF_T_WORD] = MALIGN(Word),
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[ELF_T_XWORD] = MALIGN64(Xword),
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[ELF_T_GNUHASH] = MALIGN_WORD()
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};
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int
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_libelf_malign(Elf_Type t, int elfclass)
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{
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if (t >= ELF_T_NUM || (int) t < 0)
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return (0);
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return (elfclass == ELFCLASS32 ? malign[t].a32 :
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malign[t].a64);
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}
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#define FALIGN(A32,A64) { .a32 = (A32), .a64 = (A64) }
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static struct align falign[ELF_T_NUM] = {
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[ELF_T_ADDR] = FALIGN(4,8),
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[ELF_T_BYTE] = FALIGN(1,1),
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[ELF_T_CAP] = FALIGN(4,8),
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[ELF_T_DYN] = FALIGN(4,8),
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[ELF_T_EHDR] = FALIGN(4,8),
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[ELF_T_HALF] = FALIGN(2,2),
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[ELF_T_LWORD] = FALIGN(8,8),
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[ELF_T_MOVE] = FALIGN(8,8),
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[ELF_T_MOVEP] = UNSUPPORTED(),
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[ELF_T_NOTE] = FALIGN(4,4),
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[ELF_T_OFF] = FALIGN(4,8),
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[ELF_T_PHDR] = FALIGN(4,8),
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[ELF_T_REL] = FALIGN(4,8),
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[ELF_T_RELA] = FALIGN(4,8),
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[ELF_T_SHDR] = FALIGN(4,8),
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[ELF_T_SWORD] = FALIGN(4,4),
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[ELF_T_SXWORD] = FALIGN(0,8),
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[ELF_T_SYM] = FALIGN(4,8),
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[ELF_T_SYMINFO] = FALIGN(2,2),
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[ELF_T_VDEF] = FALIGN(4,4),
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[ELF_T_VNEED] = FALIGN(4,4),
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[ELF_T_WORD] = FALIGN(4,4),
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[ELF_T_XWORD] = FALIGN(0,8),
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[ELF_T_GNUHASH] = FALIGN(4,8)
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};
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int
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_libelf_falign(Elf_Type t, int elfclass)
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{
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if (t >= ELF_T_NUM || (int) t < 0)
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return (0);
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return (elfclass == ELFCLASS32 ? falign[t].a32 :
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falign[t].a64);
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}
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