1/* PPC64 ELF support for BFD. 2 Copyright (C) 2003-2017 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#ifndef _ELF_PPC64_H 22#define _ELF_PPC64_H 23 24#include "elf/reloc-macros.h" 25 26/* Relocations. */ 27START_RELOC_NUMBERS (elf_ppc64_reloc_type) 28 RELOC_NUMBER (R_PPC64_NONE, 0) 29 RELOC_NUMBER (R_PPC64_ADDR32, 1) 30 RELOC_NUMBER (R_PPC64_ADDR24, 2) 31 RELOC_NUMBER (R_PPC64_ADDR16, 3) 32 RELOC_NUMBER (R_PPC64_ADDR16_LO, 4) 33 RELOC_NUMBER (R_PPC64_ADDR16_HI, 5) 34 RELOC_NUMBER (R_PPC64_ADDR16_HA, 6) 35 RELOC_NUMBER (R_PPC64_ADDR14, 7) 36 RELOC_NUMBER (R_PPC64_ADDR14_BRTAKEN, 8) 37 RELOC_NUMBER (R_PPC64_ADDR14_BRNTAKEN, 9) 38 RELOC_NUMBER (R_PPC64_REL24, 10) 39 RELOC_NUMBER (R_PPC64_REL14, 11) 40 RELOC_NUMBER (R_PPC64_REL14_BRTAKEN, 12) 41 RELOC_NUMBER (R_PPC64_REL14_BRNTAKEN, 13) 42 RELOC_NUMBER (R_PPC64_GOT16, 14) 43 RELOC_NUMBER (R_PPC64_GOT16_LO, 15) 44 RELOC_NUMBER (R_PPC64_GOT16_HI, 16) 45 RELOC_NUMBER (R_PPC64_GOT16_HA, 17) 46 /* 18 unused. 32-bit reloc is R_PPC_PLTREL24. */ 47 RELOC_NUMBER (R_PPC64_COPY, 19) 48 RELOC_NUMBER (R_PPC64_GLOB_DAT, 20) 49 RELOC_NUMBER (R_PPC64_JMP_SLOT, 21) 50 RELOC_NUMBER (R_PPC64_RELATIVE, 22) 51 /* 23 unused. 32-bit reloc is R_PPC_LOCAL24PC. */ 52 RELOC_NUMBER (R_PPC64_UADDR32, 24) 53 RELOC_NUMBER (R_PPC64_UADDR16, 25) 54 RELOC_NUMBER (R_PPC64_REL32, 26) 55 RELOC_NUMBER (R_PPC64_PLT32, 27) 56 RELOC_NUMBER (R_PPC64_PLTREL32, 28) 57 RELOC_NUMBER (R_PPC64_PLT16_LO, 29) 58 RELOC_NUMBER (R_PPC64_PLT16_HI, 30) 59 RELOC_NUMBER (R_PPC64_PLT16_HA, 31) 60 /* 32 unused. 32-bit reloc is R_PPC_SDAREL16. */ 61 RELOC_NUMBER (R_PPC64_SECTOFF, 33) 62 RELOC_NUMBER (R_PPC64_SECTOFF_LO, 34) 63 RELOC_NUMBER (R_PPC64_SECTOFF_HI, 35) 64 RELOC_NUMBER (R_PPC64_SECTOFF_HA, 36) 65 RELOC_NUMBER (R_PPC64_REL30, 37) 66 RELOC_NUMBER (R_PPC64_ADDR64, 38) 67 RELOC_NUMBER (R_PPC64_ADDR16_HIGHER, 39) 68 RELOC_NUMBER (R_PPC64_ADDR16_HIGHERA, 40) 69 RELOC_NUMBER (R_PPC64_ADDR16_HIGHEST, 41) 70 RELOC_NUMBER (R_PPC64_ADDR16_HIGHESTA, 42) 71 RELOC_NUMBER (R_PPC64_UADDR64, 43) 72 RELOC_NUMBER (R_PPC64_REL64, 44) 73 RELOC_NUMBER (R_PPC64_PLT64, 45) 74 RELOC_NUMBER (R_PPC64_PLTREL64, 46) 75 RELOC_NUMBER (R_PPC64_TOC16, 47) 76 RELOC_NUMBER (R_PPC64_TOC16_LO, 48) 77 RELOC_NUMBER (R_PPC64_TOC16_HI, 49) 78 RELOC_NUMBER (R_PPC64_TOC16_HA, 50) 79 RELOC_NUMBER (R_PPC64_TOC, 51) 80 RELOC_NUMBER (R_PPC64_PLTGOT16, 52) 81 RELOC_NUMBER (R_PPC64_PLTGOT16_LO, 53) 82 RELOC_NUMBER (R_PPC64_PLTGOT16_HI, 54) 83 RELOC_NUMBER (R_PPC64_PLTGOT16_HA, 55) 84 85 /* The following relocs were added in the 64-bit PowerPC ELF ABI 86 revision 1.2. */ 87 RELOC_NUMBER (R_PPC64_ADDR16_DS, 56) 88 RELOC_NUMBER (R_PPC64_ADDR16_LO_DS, 57) 89 RELOC_NUMBER (R_PPC64_GOT16_DS, 58) 90 RELOC_NUMBER (R_PPC64_GOT16_LO_DS, 59) 91 RELOC_NUMBER (R_PPC64_PLT16_LO_DS, 60) 92 RELOC_NUMBER (R_PPC64_SECTOFF_DS, 61) 93 RELOC_NUMBER (R_PPC64_SECTOFF_LO_DS, 62) 94 RELOC_NUMBER (R_PPC64_TOC16_DS, 63) 95 RELOC_NUMBER (R_PPC64_TOC16_LO_DS, 64) 96 RELOC_NUMBER (R_PPC64_PLTGOT16_DS, 65) 97 RELOC_NUMBER (R_PPC64_PLTGOT16_LO_DS, 66) 98 99 /* Relocs added to support TLS. PowerPC64 ELF ABI revision 1.5. */ 100 RELOC_NUMBER (R_PPC64_TLS, 67) 101 RELOC_NUMBER (R_PPC64_DTPMOD64, 68) 102 RELOC_NUMBER (R_PPC64_TPREL16, 69) 103 RELOC_NUMBER (R_PPC64_TPREL16_LO, 70) 104 RELOC_NUMBER (R_PPC64_TPREL16_HI, 71) 105 RELOC_NUMBER (R_PPC64_TPREL16_HA, 72) 106 RELOC_NUMBER (R_PPC64_TPREL64, 73) 107 RELOC_NUMBER (R_PPC64_DTPREL16, 74) 108 RELOC_NUMBER (R_PPC64_DTPREL16_LO, 75) 109 RELOC_NUMBER (R_PPC64_DTPREL16_HI, 76) 110 RELOC_NUMBER (R_PPC64_DTPREL16_HA, 77) 111 RELOC_NUMBER (R_PPC64_DTPREL64, 78) 112 RELOC_NUMBER (R_PPC64_GOT_TLSGD16, 79) 113 RELOC_NUMBER (R_PPC64_GOT_TLSGD16_LO, 80) 114 RELOC_NUMBER (R_PPC64_GOT_TLSGD16_HI, 81) 115 RELOC_NUMBER (R_PPC64_GOT_TLSGD16_HA, 82) 116 RELOC_NUMBER (R_PPC64_GOT_TLSLD16, 83) 117 RELOC_NUMBER (R_PPC64_GOT_TLSLD16_LO, 84) 118 RELOC_NUMBER (R_PPC64_GOT_TLSLD16_HI, 85) 119 RELOC_NUMBER (R_PPC64_GOT_TLSLD16_HA, 86) 120 RELOC_NUMBER (R_PPC64_GOT_TPREL16_DS, 87) 121 RELOC_NUMBER (R_PPC64_GOT_TPREL16_LO_DS, 88) 122 RELOC_NUMBER (R_PPC64_GOT_TPREL16_HI, 89) 123 RELOC_NUMBER (R_PPC64_GOT_TPREL16_HA, 90) 124 RELOC_NUMBER (R_PPC64_GOT_DTPREL16_DS, 91) 125 RELOC_NUMBER (R_PPC64_GOT_DTPREL16_LO_DS, 92) 126 RELOC_NUMBER (R_PPC64_GOT_DTPREL16_HI, 93) 127 RELOC_NUMBER (R_PPC64_GOT_DTPREL16_HA, 94) 128 RELOC_NUMBER (R_PPC64_TPREL16_DS, 95) 129 RELOC_NUMBER (R_PPC64_TPREL16_LO_DS, 96) 130 RELOC_NUMBER (R_PPC64_TPREL16_HIGHER, 97) 131 RELOC_NUMBER (R_PPC64_TPREL16_HIGHERA, 98) 132 RELOC_NUMBER (R_PPC64_TPREL16_HIGHEST, 99) 133 RELOC_NUMBER (R_PPC64_TPREL16_HIGHESTA, 100) 134 RELOC_NUMBER (R_PPC64_DTPREL16_DS, 101) 135 RELOC_NUMBER (R_PPC64_DTPREL16_LO_DS, 102) 136 RELOC_NUMBER (R_PPC64_DTPREL16_HIGHER, 103) 137 RELOC_NUMBER (R_PPC64_DTPREL16_HIGHERA, 104) 138 RELOC_NUMBER (R_PPC64_DTPREL16_HIGHEST, 105) 139 RELOC_NUMBER (R_PPC64_DTPREL16_HIGHESTA, 106) 140 RELOC_NUMBER (R_PPC64_TLSGD, 107) 141 RELOC_NUMBER (R_PPC64_TLSLD, 108) 142 RELOC_NUMBER (R_PPC64_TOCSAVE, 109) 143 144/* Added when HA and HI relocs were changed to report overflows. */ 145 RELOC_NUMBER (R_PPC64_ADDR16_HIGH, 110) 146 RELOC_NUMBER (R_PPC64_ADDR16_HIGHA, 111) 147 RELOC_NUMBER (R_PPC64_TPREL16_HIGH, 112) 148 RELOC_NUMBER (R_PPC64_TPREL16_HIGHA, 113) 149 RELOC_NUMBER (R_PPC64_DTPREL16_HIGH, 114) 150 RELOC_NUMBER (R_PPC64_DTPREL16_HIGHA, 115) 151 152/* Added for ELFv2. */ 153 RELOC_NUMBER (R_PPC64_REL24_NOTOC, 116) 154 RELOC_NUMBER (R_PPC64_ADDR64_LOCAL, 117) 155 RELOC_NUMBER (R_PPC64_ENTRY, 118) 156 157#ifndef RELOC_MACROS_GEN_FUNC 158/* Relocation only used internally by ld. If you need to use these 159 reloc numbers, you can change them to some other unused value 160 without affecting the ABI. They will never appear in object files. */ 161 RELOC_NUMBER (R_PPC64_LO_DS_OPT, 128) 162/* Reloc only used internally by gas. As above, value is unimportant. */ 163 RELOC_NUMBER (R_PPC64_16DX_HA, 129) 164#endif 165 166/* Power9 split rel16 for addpcis. */ 167 RELOC_NUMBER (R_PPC64_REL16DX_HA, 246) 168 169/* Support STT_GNU_IFUNC plt calls. */ 170 RELOC_NUMBER (R_PPC64_JMP_IREL, 247) 171 RELOC_NUMBER (R_PPC64_IRELATIVE, 248) 172 173/* These are GNU extensions used in PIC code sequences. */ 174 RELOC_NUMBER (R_PPC64_REL16, 249) 175 RELOC_NUMBER (R_PPC64_REL16_LO, 250) 176 RELOC_NUMBER (R_PPC64_REL16_HI, 251) 177 RELOC_NUMBER (R_PPC64_REL16_HA, 252) 178 179 /* These are GNU extensions to enable C++ vtable garbage collection. */ 180 RELOC_NUMBER (R_PPC64_GNU_VTINHERIT, 253) 181 RELOC_NUMBER (R_PPC64_GNU_VTENTRY, 254) 182 183END_RELOC_NUMBERS (R_PPC64_max) 184 185#define IS_PPC64_TLS_RELOC(R) \ 186 (((R) >= R_PPC64_TLS && (R) <= R_PPC64_DTPREL16_HIGHESTA) \ 187 || ((R) >= R_PPC64_TPREL16_HIGH && (R) <= R_PPC64_DTPREL16_HIGHA)) 188 189 190/* e_flags bits specifying ABI. 191 1 for original function descriptor using ABI, 192 2 for revised ABI without function descriptors, 193 0 for unspecified or not using any features affected by the differences. */ 194#define EF_PPC64_ABI 3 195 196/* The ELFv2 ABI uses three bits in the symbol st_other field of a 197 function definition to specify the number of instructions between a 198 function's global entry point and local entry point. 199 The global entry point is used when it is necessary to set up the 200 toc pointer (r2) for the function. Callers must enter the global 201 entry point with r12 set to the global entry point address. On 202 return from the function, r2 may have a different value to that 203 which it had on entry. 204 The local entry point is used when r2 is known to already be valid 205 for the function. There is no requirement on r12 when using the 206 local entry point, and on return r2 will contain the same value as 207 at entry. 208 A value of zero in these bits means that the function has a single 209 entry point with no requirement on r12 or r2, and that on return r2 210 will contain the same value as at entry. 211 Values of one and seven are reserved. */ 212#define STO_PPC64_LOCAL_BIT 5 213#define STO_PPC64_LOCAL_MASK (7 << STO_PPC64_LOCAL_BIT) 214 215// 3 bit other field to bytes. 216static inline unsigned int 217ppc64_decode_local_entry(unsigned int other) 218{ 219 return ((1 << other) >> 2) << 2; 220} 221 222// bytes to field value. 223static inline unsigned int 224ppc64_encode_local_entry(unsigned int val) 225{ 226 return (val >= 4 * 4 227 ? (val >= 8 * 4 228 ? (val >= 16 * 4 ? 6 : 5) 229 : 4) 230 : (val >= 2 * 4 231 ? 3 232 : (val >= 1 * 4 ? 2 : 0))); 233} 234 235/* st_other to number of bytes. */ 236#define PPC64_LOCAL_ENTRY_OFFSET(other) \ 237 ppc64_decode_local_entry (((other) & STO_PPC64_LOCAL_MASK) \ 238 >> STO_PPC64_LOCAL_BIT) 239/* number of bytes to st_other. */ 240#define PPC64_SET_LOCAL_ENTRY_OFFSET(val) \ 241 ppc64_encode_local_entry (val) << STO_PPC64_LOCAL_BIT 242 243/* Specify the start of the .glink section. */ 244#define DT_PPC64_GLINK DT_LOPROC 245 246/* Specify the start and size of the .opd section. */ 247#define DT_PPC64_OPD (DT_LOPROC + 1) 248#define DT_PPC64_OPDSZ (DT_LOPROC + 2) 249 250/* Specify whether various optimisations are possible. */ 251#define DT_PPC64_OPT (DT_LOPROC + 3) 252#define PPC64_OPT_TLS 1 253#define PPC64_OPT_MULTI_TOC 2 254 255#endif /* _ELF_PPC64_H */ 256