2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2019 John Baldwin <jhb@FreeBSD.org>
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory (Department of Computer Science and
8 * Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
9 * DARPA SSITH research programme.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/types.h>
36 #include <machine/elf.h>
44 * Apply relocations to the values we got from the file. `relbase' is the
45 * target relocation address of the section, and `dataoff' is the target
46 * relocation address of the data in `dest'.
49 ef_reloc(struct elf_file *ef, const void *reldata, int reltype, Elf_Off relbase,
50 Elf_Off dataoff, size_t len, void *dest)
55 Elf_Addr addend, addr;
56 Elf_Size rtype, symidx;
60 rel = (const Elf_Rel *)reldata;
61 where = (Elf_Addr *)((char *)dest + relbase + rel->r_offset -
64 rtype = ELF_R_TYPE(rel->r_info);
65 symidx = ELF_R_SYM(rel->r_info);
68 rela = (const Elf_Rela *)reldata;
69 where = (Elf_Addr *)((char *)dest + relbase + rela->r_offset -
71 addend = rela->r_addend;
72 rtype = ELF_R_TYPE(rela->r_info);
73 symidx = ELF_R_SYM(rela->r_info);
79 if ((char *)where < (char *)dest || (char *)where >= (char *)dest + len)
82 if (reltype == EF_RELOC_REL)
87 case R_MIPS_64: /* S + A */
89 case R_MIPS_32: /* S + A */
91 addr = EF_SYMADDR(ef, symidx);
96 warnx("unhandled relocation type %d", (int)rtype);