1/*-
2 * Copyright (c) 2003 Jake Burkholder.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <sys/types.h>
30#include <machine/elf.h>
31
32#include <err.h>
33#include <string.h>
34
35#include "ef.h"
36
37/*
38 * Apply relocations to the values we got from the file. `relbase' is the
39 * target relocation address of the section, and `dataoff' is the target
40 * relocation address of the data in `dest'.
41 */
42int
43ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase,
44    Elf_Off dataoff, size_t len, void *dest)
45{
46	const Elf_Rela *a;
47	Elf_Size w;
48
49	switch (reltype) {
50	case EF_RELOC_RELA:
51		a = reldata;
52		if (relbase + a->r_offset >= dataoff && relbase + a->r_offset <
53		    dataoff + len) {
54			switch (ELF_R_TYPE(a->r_info)) {
55			case R_SPARC_RELATIVE:
56				w = a->r_addend + relbase;
57				memcpy((u_char *)dest + (relbase + a->r_offset -
58				    dataoff), &w, sizeof(w));
59				break;
60			default:
61				warnx("unhandled relocation type %u",
62				    (unsigned int)ELF_R_TYPE(a->r_info));
63				break;
64			}
65		}
66		break;
67	}
68	return (0);
69}
70