/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <machine/elf.h>
#include <machine/endian.h>
#include <libelf.h>
#include <osreldate.h>
#include "_libelf.h"
struct align {
int a32;
int a64;
};
#ifdef __GNUC__
#define MALIGN(N) { \
.a32 = __alignof__(Elf32_##N), \
.a64 = __alignof__(Elf64_##N) \
}
#define MALIGN64(V) { \
.a32 = 0, \
.a64 = __alignof__(Elf64_##V) \
}
#define MALIGN_WORD() { \
.a32 = __alignof__(int32_t), \
.a64 = __alignof__(int64_t) \
}
#else
#error Need the __alignof__ builtin.
#endif
#define UNSUPPORTED() { \
.a32 = 0, \
.a64 = 0 \
}
static struct align malign[ELF_T_NUM] = {
[ELF_T_ADDR] = MALIGN(Addr),
[ELF_T_BYTE] = { .a32 = 1, .a64 = 1 },
#if __FreeBSD_version >= 700025
[ELF_T_CAP] = MALIGN(Cap),
#endif
[ELF_T_DYN] = MALIGN(Dyn),
[ELF_T_EHDR] = MALIGN(Ehdr),
[ELF_T_HALF] = MALIGN(Half),
#if __FreeBSD_version >= 700025
[ELF_T_LWORD] = MALIGN(Lword),
[ELF_T_MOVE] = MALIGN(Move),
#endif
[ELF_T_MOVEP] = UNSUPPORTED(),
#if __FreeBSD_version >= 700025
[ELF_T_NOTE] = MALIGN(Nhdr),
#endif
[ELF_T_OFF] = MALIGN(Off),
[ELF_T_PHDR] = MALIGN(Phdr),
[ELF_T_REL] = MALIGN(Rel),
[ELF_T_RELA] = MALIGN(Rela),
[ELF_T_SHDR] = MALIGN(Shdr),
[ELF_T_SWORD] = MALIGN(Sword),
[ELF_T_SXWORD] = MALIGN64(Sxword),
[ELF_T_SYM] = MALIGN(Sym),
#if __FreeBSD_version >= 700025
[ELF_T_SYMINFO] = MALIGN(Syminfo),
#endif
#if __FreeBSD_version >= 700009
[ELF_T_VDEF] = MALIGN(Verdef),
[ELF_T_VNEED] = MALIGN(Verneed),
#endif
[ELF_T_WORD] = MALIGN(Word),
[ELF_T_XWORD] = MALIGN64(Xword),
#if __FreeBSD_version >= 800062
[ELF_T_GNUHASH] = MALIGN_WORD()
#endif
};
int
_libelf_malign(Elf_Type t, int elfclass)
{
if (t >= ELF_T_NUM || (int) t < 0)
return (0);
return (elfclass == ELFCLASS32 ? malign[t].a32 :
malign[t].a64);
}
#define FALIGN(A32,A64) { .a32 = (A32), .a64 = (A64) }
static struct align falign[ELF_T_NUM] = {
[ELF_T_ADDR] = FALIGN(4,8),
[ELF_T_BYTE] = FALIGN(1,1),
#if __FreeBSD_version >= 700025
[ELF_T_CAP] = FALIGN(4,8),
#endif
[ELF_T_DYN] = FALIGN(4,8),
[ELF_T_EHDR] = FALIGN(4,8),
[ELF_T_HALF] = FALIGN(2,2),
#if __FreeBSD_version >= 700025
[ELF_T_LWORD] = FALIGN(8,8),
[ELF_T_MOVE] = FALIGN(8,8),
#endif
[ELF_T_MOVEP] = UNSUPPORTED(),
#if __FreeBSD_version >= 700025
[ELF_T_NOTE] = FALIGN(1,1),
#endif
[ELF_T_OFF] = FALIGN(4,8),
[ELF_T_PHDR] = FALIGN(4,8),
[ELF_T_REL] = FALIGN(4,8),
[ELF_T_RELA] = FALIGN(4,8),
[ELF_T_SHDR] = FALIGN(4,8),
[ELF_T_SWORD] = FALIGN(4,4),
[ELF_T_SXWORD] = FALIGN(0,8),
[ELF_T_SYM] = FALIGN(4,8),
#if __FreeBSD_version >= 700025
[ELF_T_SYMINFO] = FALIGN(2,2),
#endif
#if __FreeBSD_version >= 700009
[ELF_T_VDEF] = FALIGN(4,4),
[ELF_T_VNEED] = FALIGN(4,4),
#endif
[ELF_T_WORD] = FALIGN(4,4),
[ELF_T_XWORD] = FALIGN(0,8),
#if __FreeBSD_version >= 800062
[ELF_T_GNUHASH] = FALIGN(4,8)
#endif
};
int
_libelf_falign(Elf_Type t, int elfclass)
{
if (t >= ELF_T_NUM || (int) t < 0)
return (0);
return (elfclass == ELFCLASS32 ? falign[t].a32 :
falign[t].a64);
}
