1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003 Jake Burkholder.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/usr.sbin/kldxref/ef_sparc64.c 330449 2018-03-05 07:26:05Z eadler $
29 */
30
31#include <sys/types.h>
32#include <machine/elf.h>
33
34#include <err.h>
35#include <string.h>
36
37#include "ef.h"
38
39/*
40 * Apply relocations to the values we got from the file. `relbase' is the
41 * target relocation address of the section, and `dataoff' is the target
42 * relocation address of the data in `dest'.
43 */
44int
45ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase,
46    Elf_Off dataoff, size_t len, void *dest)
47{
48	const Elf_Rela *a;
49	Elf_Size w;
50
51	switch (reltype) {
52	case EF_RELOC_RELA:
53		a = reldata;
54		if (relbase + a->r_offset >= dataoff && relbase + a->r_offset <
55		    dataoff + len) {
56			switch (ELF_R_TYPE(a->r_info)) {
57			case R_SPARC_RELATIVE:
58				w = a->r_addend + relbase;
59				memcpy((u_char *)dest + (relbase + a->r_offset -
60				    dataoff), &w, sizeof(w));
61				break;
62			default:
63				warnx("unhandled relocation type %u",
64				    (unsigned int)ELF_R_TYPE(a->r_info));
65				break;
66			}
67		}
68		break;
69	}
70	return (0);
71}
72