1 /*- 2 * Copyright (c) 2005 Peter Grehan. 3 * Copyright 1996-1998 John D. Polstra. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/endian.h> 29 30 #include <err.h> 31 #include <errno.h> 32 #include <gelf.h> 33 34 #include "ef.h" 35 36 /* 37 * Apply relocations to the values obtained from the file. `relbase' is the 38 * target relocation address of the section, and `dataoff/len' is the region 39 * that is to be relocated, and has been copied to *dest 40 */ 41 static int 42 ef_aarch64_reloc(struct elf_file *ef, const void *reldata, Elf_Type reltype, 43 GElf_Addr relbase, GElf_Addr dataoff, size_t len, void *dest) 44 { 45 char *where; 46 GElf_Addr addr, addend; 47 GElf_Size rtype, symidx; 48 const GElf_Rela *rela; 49 50 if (reltype != ELF_T_RELA) 51 return (EINVAL); 52 53 rela = (const GElf_Rela *)reldata; 54 where = (char *)dest - dataoff + rela->r_offset; 55 addend = rela->r_addend; 56 rtype = GELF_R_TYPE(rela->r_info); 57 symidx = GELF_R_SYM(rela->r_info); 58 59 if (where < (char *)dest || where >= (char *)dest + len) 60 return (0); 61 62 switch(rtype) { 63 case R_AARCH64_RELATIVE: 64 le64enc(where, relbase + addend); 65 break; 66 case R_AARCH64_ABS64: 67 addr = EF_SYMADDR(ef, symidx) + addend; 68 le64enc(where, addr); 69 break; 70 default: 71 warnx("unhandled relocation type %d", (int)rtype); 72 break; 73 } 74 return (0); 75 } 76 77 ELF_RELOC(ELFCLASS64, ELFDATA2LSB, EM_AARCH64, ef_aarch64_reloc); 78