1f5e45e53SAndrew Turner /*-
2f5e45e53SAndrew Turner * Copyright (c) 2005 Peter Grehan.
3f5e45e53SAndrew Turner * Copyright 1996-1998 John D. Polstra.
4f5e45e53SAndrew Turner * All rights reserved.
5f5e45e53SAndrew Turner *
6f5e45e53SAndrew Turner * Redistribution and use in source and binary forms, with or without
7f5e45e53SAndrew Turner * modification, are permitted provided that the following conditions
8f5e45e53SAndrew Turner * are met:
9f5e45e53SAndrew Turner * 1. Redistributions of source code must retain the above copyright
10f5e45e53SAndrew Turner * notice, this list of conditions and the following disclaimer.
11f5e45e53SAndrew Turner * 2. Redistributions in binary form must reproduce the above copyright
12f5e45e53SAndrew Turner * notice, this list of conditions and the following disclaimer in the
13f5e45e53SAndrew Turner * documentation and/or other materials provided with the distribution.
14f5e45e53SAndrew Turner *
15f5e45e53SAndrew Turner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16f5e45e53SAndrew Turner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17f5e45e53SAndrew Turner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18f5e45e53SAndrew Turner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19f5e45e53SAndrew Turner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20f5e45e53SAndrew Turner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21f5e45e53SAndrew Turner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22f5e45e53SAndrew Turner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23f5e45e53SAndrew Turner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24f5e45e53SAndrew Turner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25f5e45e53SAndrew Turner * SUCH DAMAGE.
26f5e45e53SAndrew Turner */
27f5e45e53SAndrew Turner
280299afdfSJohn Baldwin #include <sys/endian.h>
29f5e45e53SAndrew Turner
30f5e45e53SAndrew Turner #include <err.h>
31f5e45e53SAndrew Turner #include <errno.h>
320299afdfSJohn Baldwin #include <gelf.h>
33f5e45e53SAndrew Turner
34f5e45e53SAndrew Turner #include "ef.h"
35f5e45e53SAndrew Turner
36f5e45e53SAndrew Turner /*
37f5e45e53SAndrew Turner * Apply relocations to the values obtained from the file. `relbase' is the
38f5e45e53SAndrew Turner * target relocation address of the section, and `dataoff/len' is the region
39f5e45e53SAndrew Turner * that is to be relocated, and has been copied to *dest
40f5e45e53SAndrew Turner */
410299afdfSJohn Baldwin static int
ef_aarch64_reloc(struct elf_file * ef,const void * reldata,Elf_Type reltype,GElf_Addr relbase,GElf_Addr dataoff,size_t len,void * dest)420299afdfSJohn Baldwin ef_aarch64_reloc(struct elf_file *ef, const void *reldata, Elf_Type reltype,
430299afdfSJohn Baldwin GElf_Addr relbase, GElf_Addr dataoff, size_t len, void *dest)
44f5e45e53SAndrew Turner {
450299afdfSJohn Baldwin char *where;
46aaba1490SJessica Clarke GElf_Addr addr, addend;
47aaba1490SJessica Clarke GElf_Size rtype, symidx;
480299afdfSJohn Baldwin const GElf_Rela *rela;
49f5e45e53SAndrew Turner
502a622f14SJessica Clarke switch (reltype) {
512a622f14SJessica Clarke case ELF_T_RELA:
520299afdfSJohn Baldwin rela = (const GElf_Rela *)reldata;
532a622f14SJessica Clarke where = (char *)dest + (relbase + rela->r_offset - dataoff);
54f5e45e53SAndrew Turner addend = rela->r_addend;
550299afdfSJohn Baldwin rtype = GELF_R_TYPE(rela->r_info);
56aaba1490SJessica Clarke symidx = GELF_R_SYM(rela->r_info);
572a622f14SJessica Clarke break;
582a622f14SJessica Clarke default:
592a622f14SJessica Clarke return (EINVAL);
602a622f14SJessica Clarke }
61f5e45e53SAndrew Turner
620299afdfSJohn Baldwin if (where < (char *)dest || where >= (char *)dest + len)
63f5e45e53SAndrew Turner return (0);
64f5e45e53SAndrew Turner
65f5e45e53SAndrew Turner switch (rtype) {
66f5e45e53SAndrew Turner case R_AARCH64_RELATIVE:
672a622f14SJessica Clarke addr = relbase + addend;
682a622f14SJessica Clarke le64enc(where, addr);
69f5e45e53SAndrew Turner break;
70f5e45e53SAndrew Turner case R_AARCH64_ABS64:
71aaba1490SJessica Clarke addr = EF_SYMADDR(ef, symidx) + addend;
72aaba1490SJessica Clarke le64enc(where, addr);
73f5e45e53SAndrew Turner break;
74f5e45e53SAndrew Turner default:
75894f3f48SJohn Baldwin warnx("unhandled relocation type %d", (int)rtype);
76f5e45e53SAndrew Turner break;
77f5e45e53SAndrew Turner }
78f5e45e53SAndrew Turner return (0);
79f5e45e53SAndrew Turner }
800299afdfSJohn Baldwin
810299afdfSJohn Baldwin ELF_RELOC(ELFCLASS64, ELFDATA2LSB, EM_AARCH64, ef_aarch64_reloc);
82