| 1 | /* PPC64 ELF support for BFD. |
| 2 | Copyright (C) 2003-2016 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 | #ifndef RELOC_MACROS_GEN_FUNC |
| 158 | /* Fake relocation only used internally by ld. */ |
| 159 | RELOC_NUMBER (R_PPC64_LO_DS_OPT, 128) |
| 160 | #endif |
| 161 | |
| 162 | /* Power9 split rel16 for addpcis. */ |
| 163 | RELOC_NUMBER (R_PPC64_REL16DX_HA, 246) |
| 164 | |
| 165 | /* Support STT_GNU_IFUNC plt calls. */ |
| 166 | RELOC_NUMBER (R_PPC64_JMP_IREL, 247) |
| 167 | RELOC_NUMBER (R_PPC64_IRELATIVE, 248) |
| 168 | |
| 169 | /* These are GNU extensions used in PIC code sequences. */ |
| 170 | RELOC_NUMBER (R_PPC64_REL16, 249) |
| 171 | RELOC_NUMBER (R_PPC64_REL16_LO, 250) |
| 172 | RELOC_NUMBER (R_PPC64_REL16_HI, 251) |
| 173 | RELOC_NUMBER (R_PPC64_REL16_HA, 252) |
| 174 | |
| 175 | /* These are GNU extensions to enable C++ vtable garbage collection. */ |
| 176 | RELOC_NUMBER (R_PPC64_GNU_VTINHERIT, 253) |
| 177 | RELOC_NUMBER (R_PPC64_GNU_VTENTRY, 254) |
| 178 | |
| 179 | END_RELOC_NUMBERS (R_PPC64_max) |
| 180 | |
| 181 | #define IS_PPC64_TLS_RELOC(R) \ |
| 182 | (((R) >= R_PPC64_TLS && (R) <= R_PPC64_DTPREL16_HIGHESTA) \ |
| 183 | || ((R) >= R_PPC64_TPREL16_HIGH && (R) <= R_PPC64_DTPREL16_HIGHA)) |
| 184 | |
| 185 | |
| 186 | /* e_flags bits specifying ABI. |
| 187 | 1 for original function descriptor using ABI, |
| 188 | 2 for revised ABI without function descriptors, |
| 189 | 0 for unspecified or not using any features affected by the differences. */ |
| 190 | #define EF_PPC64_ABI 3 |
| 191 | |
| 192 | /* The ELFv2 ABI uses three bits in the symbol st_other field of a |
| 193 | function definition to specify the number of instructions between a |
| 194 | function's global entry point and local entry point. |
| 195 | The global entry point is used when it is necessary to set up the |
| 196 | toc pointer (r2) for the function. Callers must enter the global |
| 197 | entry point with r12 set to the global entry point address. On |
| 198 | return from the function, r2 may have a different value to that |
| 199 | which it had on entry. |
| 200 | The local entry point is used when r2 is known to already be valid |
| 201 | for the function. There is no requirement on r12 when using the |
| 202 | local entry point, and on return r2 will contain the same value as |
| 203 | at entry. |
| 204 | A value of zero in these bits means that the function has a single |
| 205 | entry point with no requirement on r12 or r2, and that on return r2 |
| 206 | will contain the same value as at entry. |
| 207 | Values of one and seven are reserved. */ |
| 208 | #define STO_PPC64_LOCAL_BIT 5 |
| 209 | #define STO_PPC64_LOCAL_MASK (7 << STO_PPC64_LOCAL_BIT) |
| 210 | |
| 211 | // 3 bit other field to bytes. |
| 212 | static inline unsigned int |
| 213 | ppc64_decode_local_entry(unsigned int other) |
| 214 | { |
| 215 | return ((1 << other) >> 2) << 2; |
| 216 | } |
| 217 | |
| 218 | // bytes to field value. |
| 219 | static inline unsigned int |
| 220 | ppc64_encode_local_entry(unsigned int val) |
| 221 | { |
| 222 | return (val >= 4 * 4 |
| 223 | ? (val >= 8 * 4 |
| 224 | ? (val >= 16 * 4 ? 6 : 5) |
| 225 | : 4) |
| 226 | : (val >= 2 * 4 |
| 227 | ? 3 |
| 228 | : (val >= 1 * 4 ? 2 : 0))); |
| 229 | } |
| 230 | |
| 231 | /* st_other to number of bytes. */ |
| 232 | #define PPC64_LOCAL_ENTRY_OFFSET(other) \ |
| 233 | ppc64_decode_local_entry (((other) & STO_PPC64_LOCAL_MASK) \ |
| 234 | >> STO_PPC64_LOCAL_BIT) |
| 235 | /* number of bytes to st_other. */ |
| 236 | #define PPC64_SET_LOCAL_ENTRY_OFFSET(val) \ |
| 237 | ppc64_encode_local_entry (val) << STO_PPC64_LOCAL_BIT |
| 238 | |
| 239 | /* Specify the start of the .glink section. */ |
| 240 | #define DT_PPC64_GLINK DT_LOPROC |
| 241 | |
| 242 | /* Specify the start and size of the .opd section. */ |
| 243 | #define DT_PPC64_OPD (DT_LOPROC + 1) |
| 244 | #define DT_PPC64_OPDSZ (DT_LOPROC + 2) |
| 245 | |
| 246 | /* Specify whether various optimisations are possible. */ |
| 247 | #define DT_PPC64_OPT (DT_LOPROC + 3) |
| 248 | #define PPC64_OPT_TLS 1 |
| 249 | #define PPC64_OPT_MULTI_TOC 2 |
| 250 | |
| 251 | #endif /* _ELF_PPC64_H */ |