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-rw-r--r--ext/libelf/libelf_align.c130
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diff --git a/ext/libelf/libelf_align.c b/ext/libelf/libelf_align.c
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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.
+ */
+
+#include <sys/types.h>
+
+//#include <machine/elf.h>
+//#include <machine/endian.h>
+
+#include "libelf.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) \
+ }
+#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 },
+ [ELF_T_CAP] = MALIGN(Cap),
+ [ELF_T_DYN] = MALIGN(Dyn),
+ [ELF_T_EHDR] = MALIGN(Ehdr),
+ [ELF_T_HALF] = MALIGN(Half),
+ [ELF_T_LWORD] = MALIGN(Lword),
+ [ELF_T_MOVE] = MALIGN(Move),
+ [ELF_T_MOVEP] = UNSUPPORTED(),
+ [ELF_T_NOTE] = MALIGN(Nhdr),
+ [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),
+ [ELF_T_SYMINFO] = MALIGN(Syminfo),
+ [ELF_T_VDEF] = MALIGN(Verdef),
+ [ELF_T_VNEED] = MALIGN(Verneed),
+ [ELF_T_WORD] = MALIGN(Word),
+ [ELF_T_XWORD] = MALIGN64(Xword)
+};
+
+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),
+ [ELF_T_CAP] = FALIGN(4,8),
+ [ELF_T_DYN] = FALIGN(4,8),
+ [ELF_T_EHDR] = FALIGN(4,8),
+ [ELF_T_HALF] = FALIGN(2,2),
+ [ELF_T_LWORD] = FALIGN(8,8),
+ [ELF_T_MOVE] = FALIGN(8,8),
+ [ELF_T_MOVEP] = UNSUPPORTED(),
+ [ELF_T_NOTE] = FALIGN(4,4),
+ [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),
+ [ELF_T_SYMINFO] = FALIGN(2,2),
+ [ELF_T_VDEF] = FALIGN(4,4),
+ [ELF_T_VNEED] = FALIGN(4,4),
+ [ELF_T_WORD] = FALIGN(4,4),
+ [ELF_T_XWORD] = FALIGN(0,8)
+};
+
+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);
+}