1 /*- 2 * Copyright (c) 2018 John Baldwin 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 27 #include <gelf.h> 28 29 #include "_libelf.h" 30 31 ELFTC_VCSID("$Id$"); 32 33 int 34 _libelf_is_mips64el(Elf *e) 35 { 36 37 return (e->e_kind == ELF_K_ELF && e->e_class == ELFCLASS64 && 38 e->e_u.e_elf.e_ehdr.e_ehdr64->e_machine == EM_MIPS && 39 e->e_u.e_elf.e_ehdr.e_ehdr64->e_ident[EI_DATA] == ELFDATA2LSB); 40 } 41 42 /* 43 * For MIPS64, the r_info field is actually stored as a 32-bit symbol 44 * index (r_sym) followed by four single-byte fields (r_ssym, r_type3, 45 * r_type2, and r_type). The byte-swap for the little-endian case 46 * jumbles this incorrectly so compensate. 47 */ 48 Elf64_Xword 49 _libelf_mips64el_r_info_tof(Elf64_Xword r_info) 50 { 51 Elf64_Xword new_info; 52 uint8_t ssym, type3, type2, type; 53 54 ssym = r_info >> 24; 55 type3 = r_info >> 16; 56 type2 = r_info >> 8; 57 type = r_info; 58 new_info = r_info >> 32; 59 new_info |= (Elf64_Xword)ssym << 32; 60 new_info |= (Elf64_Xword)type3 << 40; 61 new_info |= (Elf64_Xword)type2 << 48; 62 new_info |= (Elf64_Xword)type << 56; 63 return (new_info); 64 } 65 66 Elf64_Xword 67 _libelf_mips64el_r_info_tom(Elf64_Xword r_info) 68 { 69 Elf64_Xword new_info; 70 uint8_t ssym, type3, type2, type; 71 72 ssym = r_info >> 32; 73 type3 = r_info >> 40; 74 type2 = r_info >> 48; 75 type = r_info >> 56; 76 new_info = (r_info & 0xffffffff) << 32; 77 new_info |= (Elf64_Xword)ssym << 24; 78 new_info |= (Elf64_Xword)type3 << 16; 79 new_info |= (Elf64_Xword)type2 << 8; 80 new_info |= (Elf64_Xword)type; 81 return (new_info); 82 } 83