1 /* PPC64 ELF support for BFD. 2 Copyright (C) 2003-2020 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. */ 27 START_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 /* Marker reloc for inline plt call insns. */ 158 RELOC_NUMBER (R_PPC64_PLTSEQ, 119) 159 RELOC_NUMBER (R_PPC64_PLTCALL, 120) 160 161 /* Powerxx support. */ 162 RELOC_NUMBER (R_PPC64_PLTSEQ_NOTOC, 121) 163 RELOC_NUMBER (R_PPC64_PLTCALL_NOTOC, 122) 164 RELOC_NUMBER (R_PPC64_PCREL_OPT, 123) 165 166 RELOC_NUMBER (R_PPC64_D34, 128) 167 RELOC_NUMBER (R_PPC64_D34_LO, 129) 168 RELOC_NUMBER (R_PPC64_D34_HI30, 130) 169 RELOC_NUMBER (R_PPC64_D34_HA30, 131) 170 RELOC_NUMBER (R_PPC64_PCREL34, 132) 171 RELOC_NUMBER (R_PPC64_GOT_PCREL34, 133) 172 RELOC_NUMBER (R_PPC64_PLT_PCREL34, 134) 173 RELOC_NUMBER (R_PPC64_PLT_PCREL34_NOTOC, 135) 174 RELOC_NUMBER (R_PPC64_ADDR16_HIGHER34, 136) 175 RELOC_NUMBER (R_PPC64_ADDR16_HIGHERA34, 137) 176 RELOC_NUMBER (R_PPC64_ADDR16_HIGHEST34, 138) 177 RELOC_NUMBER (R_PPC64_ADDR16_HIGHESTA34, 139) 178 RELOC_NUMBER (R_PPC64_REL16_HIGHER34, 140) 179 RELOC_NUMBER (R_PPC64_REL16_HIGHERA34, 141) 180 RELOC_NUMBER (R_PPC64_REL16_HIGHEST34, 142) 181 RELOC_NUMBER (R_PPC64_REL16_HIGHESTA34, 143) 182 RELOC_NUMBER (R_PPC64_D28, 144) 183 RELOC_NUMBER (R_PPC64_PCREL28, 145) 184 RELOC_NUMBER (R_PPC64_TPREL34, 146) 185 RELOC_NUMBER (R_PPC64_DTPREL34, 147) 186 RELOC_NUMBER (R_PPC64_GOT_TLSGD34, 148) 187 RELOC_NUMBER (R_PPC64_GOT_TLSLD34, 149) 188 RELOC_NUMBER (R_PPC64_GOT_TPREL34, 150) 189 RELOC_NUMBER (R_PPC64_GOT_DTPREL34, 151) 190 191 #ifndef RELOC_MACROS_GEN_FUNC 192 /* Relocation only used internally by gas or ld. If you need to use 193 these reloc numbers, you can change them to some other unused value 194 without affecting the ABI. They will never appear in object files. */ 195 RELOC_NUMBER (R_PPC64_LO_DS_OPT, 200) 196 RELOC_NUMBER (R_PPC64_16DX_HA, 201) 197 #endif 198 199 RELOC_NUMBER (R_PPC64_REL16_HIGH, 240) 200 RELOC_NUMBER (R_PPC64_REL16_HIGHA, 241) 201 RELOC_NUMBER (R_PPC64_REL16_HIGHER, 242) 202 RELOC_NUMBER (R_PPC64_REL16_HIGHERA, 243) 203 RELOC_NUMBER (R_PPC64_REL16_HIGHEST, 244) 204 RELOC_NUMBER (R_PPC64_REL16_HIGHESTA, 245) 205 206 /* Power9 split rel16 for addpcis. */ 207 RELOC_NUMBER (R_PPC64_REL16DX_HA, 246) 208 209 /* Support STT_GNU_IFUNC plt calls. */ 210 RELOC_NUMBER (R_PPC64_JMP_IREL, 247) 211 RELOC_NUMBER (R_PPC64_IRELATIVE, 248) 212 213 /* These are GNU extensions used in PIC code sequences. */ 214 RELOC_NUMBER (R_PPC64_REL16, 249) 215 RELOC_NUMBER (R_PPC64_REL16_LO, 250) 216 RELOC_NUMBER (R_PPC64_REL16_HI, 251) 217 RELOC_NUMBER (R_PPC64_REL16_HA, 252) 218 219 /* These are GNU extensions to enable C++ vtable garbage collection. */ 220 RELOC_NUMBER (R_PPC64_GNU_VTINHERIT, 253) 221 RELOC_NUMBER (R_PPC64_GNU_VTENTRY, 254) 222 223 END_RELOC_NUMBERS (R_PPC64_max) 224 225 #define IS_PPC64_TLS_RELOC(R) \ 226 (((R) >= R_PPC64_TLS && (R) <= R_PPC64_DTPREL16_HIGHESTA) \ 227 || ((R) >= R_PPC64_TPREL16_HIGH && (R) <= R_PPC64_DTPREL16_HIGHA) \ 228 || ((R) >= R_PPC64_TPREL34 && (R) <= R_PPC64_GOT_DTPREL34)) 229 230 /* e_flags bits specifying ABI. 231 1 for original function descriptor using ABI, 232 2 for revised ABI without function descriptors, 233 0 for unspecified or not using any features affected by the differences. */ 234 #define EF_PPC64_ABI 3 235 236 /* The ELFv2 ABI uses three bits in the symbol st_other field of a 237 function definition to specify the number of bytes between a 238 function's global entry point and local entry point. 239 Values of two to six specify powers of two from four to sixty four 240 bytes. For such functions: 241 The global entry point is used when it is necessary to set up the 242 toc pointer (r2) for the function. Callers must enter the global 243 entry point with r12 set to the global entry point address. On 244 return from the function r2 will contain the toc pointer for the 245 function. 246 The local entry point is used when r2 is known to already be valid 247 for the function. There is no requirement on r12 when using the 248 local entry point, and on return r2 will contain the same value as 249 at entry. 250 A value of zero in these bits means that the function has a single 251 entry point with no requirement on r12 or r2, and that on return r2 252 will contain the same value as at entry. 253 A value of one means that the function has a single entry point 254 with no requirement on r12 or r2, and that r2 is *not* preserved. 255 A value of seven is reserved. */ 256 #define STO_PPC64_LOCAL_BIT 5 257 #define STO_PPC64_LOCAL_MASK (7 << STO_PPC64_LOCAL_BIT) 258 259 // 3 bit other field to bytes. 260 static inline unsigned int 261 ppc64_decode_local_entry(unsigned int other) 262 { 263 return ((1 << other) >> 2) << 2; 264 } 265 266 // bytes to field value. 267 static inline unsigned int 268 ppc64_encode_local_entry(unsigned int val) 269 { 270 return (val >= 4 * 4 271 ? (val >= 8 * 4 272 ? (val >= 16 * 4 ? 6 : 5) 273 : 4) 274 : (val >= 2 * 4 275 ? 3 276 : (val >= 1 * 4 ? 2 : 0))); 277 } 278 279 /* st_other to number of bytes. */ 280 #define PPC64_LOCAL_ENTRY_OFFSET(other) \ 281 ppc64_decode_local_entry (((other) & STO_PPC64_LOCAL_MASK) \ 282 >> STO_PPC64_LOCAL_BIT) 283 /* number of bytes to st_other. */ 284 #define PPC64_SET_LOCAL_ENTRY_OFFSET(val) \ 285 ppc64_encode_local_entry (val) << STO_PPC64_LOCAL_BIT 286 287 /* Specify the start of the .glink section. */ 288 #define DT_PPC64_GLINK DT_LOPROC 289 290 /* Specify the start and size of the .opd section. */ 291 #define DT_PPC64_OPD (DT_LOPROC + 1) 292 #define DT_PPC64_OPDSZ (DT_LOPROC + 2) 293 294 /* Specify whether various optimisations are possible. */ 295 #define DT_PPC64_OPT (DT_LOPROC + 3) 296 #define PPC64_OPT_TLS 1 297 #define PPC64_OPT_MULTI_TOC 2 298 #define PPC64_OPT_LOCALENTRY 4 299 300 #endif /* _ELF_PPC64_H */ 301