1 /*- 2 * Copyright (c) 2018 John Baldwin 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <gelf.h> 27 28 #include "_libelf.h" 29 30 ELFTC_VCSID("$Id$"); 31 32 int 33 _libelf_is_mips64el(Elf *e) 34 { 35 36 return (e->e_kind == ELF_K_ELF && e->e_class == ELFCLASS64 && 37 e->e_u.e_elf.e_ehdr.e_ehdr64->e_machine == EM_MIPS && 38 e->e_u.e_elf.e_ehdr.e_ehdr64->e_ident[EI_DATA] == ELFDATA2LSB); 39 } 40 41 /* 42 * For MIPS64, the r_info field is actually stored as a 32-bit symbol 43 * index (r_sym) followed by four single-byte fields (r_ssym, r_type3, 44 * r_type2, and r_type). The byte-swap for the little-endian case 45 * jumbles this incorrectly so compensate. 46 */ 47 Elf64_Xword 48 _libelf_mips64el_r_info_tof(Elf64_Xword r_info) 49 { 50 Elf64_Xword new_info; 51 uint8_t ssym, type3, type2, type; 52 53 ssym = r_info >> 24; 54 type3 = r_info >> 16; 55 type2 = r_info >> 8; 56 type = r_info; 57 new_info = r_info >> 32; 58 new_info |= (Elf64_Xword)ssym << 32; 59 new_info |= (Elf64_Xword)type3 << 40; 60 new_info |= (Elf64_Xword)type2 << 48; 61 new_info |= (Elf64_Xword)type << 56; 62 return (new_info); 63 } 64 65 Elf64_Xword 66 _libelf_mips64el_r_info_tom(Elf64_Xword r_info) 67 { 68 Elf64_Xword new_info; 69 uint8_t ssym, type3, type2, type; 70 71 ssym = r_info >> 32; 72 type3 = r_info >> 40; 73 type2 = r_info >> 48; 74 type = r_info >> 56; 75 new_info = (r_info & 0xffffffff) << 32; 76 new_info |= (Elf64_Xword)ssym << 24; 77 new_info |= (Elf64_Xword)type3 << 16; 78 new_info |= (Elf64_Xword)type2 << 8; 79 new_info |= (Elf64_Xword)type; 80 return (new_info); 81 } 82