1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 #ifndef _ASM_ELF_H 6 #define _ASM_ELF_H 7 8 #include <linux/auxvec.h> 9 #include <linux/fs.h> 10 #include <uapi/linux/elf.h> 11 12 #include <asm/current.h> 13 #include <asm/vdso.h> 14 15 /* The ABI of a file. */ 16 #define EF_LOONGARCH_ABI_LP64_SOFT_FLOAT 0x1 17 #define EF_LOONGARCH_ABI_LP64_SINGLE_FLOAT 0x2 18 #define EF_LOONGARCH_ABI_LP64_DOUBLE_FLOAT 0x3 19 20 #define EF_LOONGARCH_ABI_ILP32_SOFT_FLOAT 0x5 21 #define EF_LOONGARCH_ABI_ILP32_SINGLE_FLOAT 0x6 22 #define EF_LOONGARCH_ABI_ILP32_DOUBLE_FLOAT 0x7 23 24 /* LoongArch relocation types used by the dynamic linker */ 25 #define R_LARCH_NONE 0 26 #define R_LARCH_32 1 27 #define R_LARCH_64 2 28 #define R_LARCH_RELATIVE 3 29 #define R_LARCH_COPY 4 30 #define R_LARCH_JUMP_SLOT 5 31 #define R_LARCH_TLS_DTPMOD32 6 32 #define R_LARCH_TLS_DTPMOD64 7 33 #define R_LARCH_TLS_DTPREL32 8 34 #define R_LARCH_TLS_DTPREL64 9 35 #define R_LARCH_TLS_TPREL32 10 36 #define R_LARCH_TLS_TPREL64 11 37 #define R_LARCH_IRELATIVE 12 38 #define R_LARCH_MARK_LA 20 39 #define R_LARCH_MARK_PCREL 21 40 #define R_LARCH_SOP_PUSH_PCREL 22 41 #define R_LARCH_SOP_PUSH_ABSOLUTE 23 42 #define R_LARCH_SOP_PUSH_DUP 24 43 #define R_LARCH_SOP_PUSH_GPREL 25 44 #define R_LARCH_SOP_PUSH_TLS_TPREL 26 45 #define R_LARCH_SOP_PUSH_TLS_GOT 27 46 #define R_LARCH_SOP_PUSH_TLS_GD 28 47 #define R_LARCH_SOP_PUSH_PLT_PCREL 29 48 #define R_LARCH_SOP_ASSERT 30 49 #define R_LARCH_SOP_NOT 31 50 #define R_LARCH_SOP_SUB 32 51 #define R_LARCH_SOP_SL 33 52 #define R_LARCH_SOP_SR 34 53 #define R_LARCH_SOP_ADD 35 54 #define R_LARCH_SOP_AND 36 55 #define R_LARCH_SOP_IF_ELSE 37 56 #define R_LARCH_SOP_POP_32_S_10_5 38 57 #define R_LARCH_SOP_POP_32_U_10_12 39 58 #define R_LARCH_SOP_POP_32_S_10_12 40 59 #define R_LARCH_SOP_POP_32_S_10_16 41 60 #define R_LARCH_SOP_POP_32_S_10_16_S2 42 61 #define R_LARCH_SOP_POP_32_S_5_20 43 62 #define R_LARCH_SOP_POP_32_S_0_5_10_16_S2 44 63 #define R_LARCH_SOP_POP_32_S_0_10_10_16_S2 45 64 #define R_LARCH_SOP_POP_32_U 46 65 #define R_LARCH_ADD8 47 66 #define R_LARCH_ADD16 48 67 #define R_LARCH_ADD24 49 68 #define R_LARCH_ADD32 50 69 #define R_LARCH_ADD64 51 70 #define R_LARCH_SUB8 52 71 #define R_LARCH_SUB16 53 72 #define R_LARCH_SUB24 54 73 #define R_LARCH_SUB32 55 74 #define R_LARCH_SUB64 56 75 #define R_LARCH_GNU_VTINHERIT 57 76 #define R_LARCH_GNU_VTENTRY 58 77 #define R_LARCH_B16 64 78 #define R_LARCH_B21 65 79 #define R_LARCH_B26 66 80 #define R_LARCH_ABS_HI20 67 81 #define R_LARCH_ABS_LO12 68 82 #define R_LARCH_ABS64_LO20 69 83 #define R_LARCH_ABS64_HI12 70 84 #define R_LARCH_PCALA_HI20 71 85 #define R_LARCH_PCALA_LO12 72 86 #define R_LARCH_PCALA64_LO20 73 87 #define R_LARCH_PCALA64_HI12 74 88 #define R_LARCH_GOT_PC_HI20 75 89 #define R_LARCH_GOT_PC_LO12 76 90 #define R_LARCH_GOT64_PC_LO20 77 91 #define R_LARCH_GOT64_PC_HI12 78 92 #define R_LARCH_GOT_HI20 79 93 #define R_LARCH_GOT_LO12 80 94 #define R_LARCH_GOT64_LO20 81 95 #define R_LARCH_GOT64_HI12 82 96 #define R_LARCH_TLS_LE_HI20 83 97 #define R_LARCH_TLS_LE_LO12 84 98 #define R_LARCH_TLS_LE64_LO20 85 99 #define R_LARCH_TLS_LE64_HI12 86 100 #define R_LARCH_TLS_IE_PC_HI20 87 101 #define R_LARCH_TLS_IE_PC_LO12 88 102 #define R_LARCH_TLS_IE64_PC_LO20 89 103 #define R_LARCH_TLS_IE64_PC_HI12 90 104 #define R_LARCH_TLS_IE_HI20 91 105 #define R_LARCH_TLS_IE_LO12 92 106 #define R_LARCH_TLS_IE64_LO20 93 107 #define R_LARCH_TLS_IE64_HI12 94 108 #define R_LARCH_TLS_LD_PC_HI20 95 109 #define R_LARCH_TLS_LD_HI20 96 110 #define R_LARCH_TLS_GD_PC_HI20 97 111 #define R_LARCH_TLS_GD_HI20 98 112 #define R_LARCH_32_PCREL 99 113 #define R_LARCH_RELAX 100 114 115 #ifndef ELF_ARCH 116 117 /* ELF register definitions */ 118 119 /* 120 * General purpose have the following registers: 121 * Register Number 122 * GPRs 32 123 * ORIG_A0 1 124 * ERA 1 125 * BADVADDR 1 126 * CRMD 1 127 * PRMD 1 128 * EUEN 1 129 * ECFG 1 130 * ESTAT 1 131 * Reserved 5 132 */ 133 #define ELF_NGREG 45 134 135 /* 136 * Floating point have the following registers: 137 * Register Number 138 * FPR 32 139 * FCC 1 140 * FCSR 1 141 */ 142 #define ELF_NFPREG 34 143 144 typedef unsigned long elf_greg_t; 145 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 146 147 typedef double elf_fpreg_t; 148 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 149 150 void loongarch_dump_regs64(u64 *uregs, const struct pt_regs *regs); 151 152 #ifdef CONFIG_32BIT 153 /* 154 * This is used to ensure we don't load something for the wrong architecture. 155 */ 156 #define elf_check_arch elf32_check_arch 157 158 /* 159 * These are used to set parameters in the core dumps. 160 */ 161 #define ELF_CLASS ELFCLASS32 162 163 #define ELF_CORE_COPY_REGS(dest, regs) \ 164 loongarch_dump_regs32((u32 *)&(dest), (regs)); 165 166 #endif /* CONFIG_32BIT */ 167 168 #ifdef CONFIG_64BIT 169 /* 170 * This is used to ensure we don't load something for the wrong architecture. 171 */ 172 #define elf_check_arch elf64_check_arch 173 174 /* 175 * These are used to set parameters in the core dumps. 176 */ 177 #define ELF_CLASS ELFCLASS64 178 179 #define ELF_CORE_COPY_REGS(dest, regs) \ 180 loongarch_dump_regs64((u64 *)&(dest), (regs)); 181 182 #endif /* CONFIG_64BIT */ 183 184 /* 185 * These are used to set parameters in the core dumps. 186 */ 187 #define ELF_DATA ELFDATA2LSB 188 #define ELF_ARCH EM_LOONGARCH 189 190 #endif /* !defined(ELF_ARCH) */ 191 192 #define loongarch_elf_check_machine(x) ((x)->e_machine == EM_LOONGARCH) 193 194 #define vmcore_elf32_check_arch loongarch_elf_check_machine 195 #define vmcore_elf64_check_arch loongarch_elf_check_machine 196 197 /* 198 * Return non-zero if HDR identifies an 32bit ELF binary. 199 */ 200 #define elf32_check_arch(hdr) \ 201 ({ \ 202 int __res = 1; \ 203 struct elfhdr *__h = (hdr); \ 204 \ 205 if (!loongarch_elf_check_machine(__h)) \ 206 __res = 0; \ 207 if (__h->e_ident[EI_CLASS] != ELFCLASS32) \ 208 __res = 0; \ 209 \ 210 __res; \ 211 }) 212 213 /* 214 * Return non-zero if HDR identifies an 64bit ELF binary. 215 */ 216 #define elf64_check_arch(hdr) \ 217 ({ \ 218 int __res = 1; \ 219 struct elfhdr *__h = (hdr); \ 220 \ 221 if (!loongarch_elf_check_machine(__h)) \ 222 __res = 0; \ 223 if (__h->e_ident[EI_CLASS] != ELFCLASS64) \ 224 __res = 0; \ 225 \ 226 __res; \ 227 }) 228 229 #ifdef CONFIG_32BIT 230 231 #define SET_PERSONALITY2(ex, state) \ 232 do { \ 233 current->thread.vdso = &vdso_info; \ 234 \ 235 loongarch_set_personality_fcsr(state); \ 236 \ 237 if (personality(current->personality) != PER_LINUX) \ 238 set_personality(PER_LINUX); \ 239 } while (0) 240 241 #endif /* CONFIG_32BIT */ 242 243 #ifdef CONFIG_64BIT 244 245 #define SET_PERSONALITY2(ex, state) \ 246 do { \ 247 unsigned int p; \ 248 \ 249 clear_thread_flag(TIF_32BIT_REGS); \ 250 clear_thread_flag(TIF_32BIT_ADDR); \ 251 \ 252 current->thread.vdso = &vdso_info; \ 253 loongarch_set_personality_fcsr(state); \ 254 \ 255 p = personality(current->personality); \ 256 if (p != PER_LINUX32 && p != PER_LINUX) \ 257 set_personality(PER_LINUX); \ 258 } while (0) 259 260 #endif /* CONFIG_64BIT */ 261 262 #define CORE_DUMP_USE_REGSET 263 #define ELF_EXEC_PAGESIZE PAGE_SIZE 264 265 /* 266 * This yields a mask that user programs can use to figure out what 267 * instruction set this cpu supports. This could be done in userspace, 268 * but it's not easy, and we've already done it here. 269 */ 270 271 #define ELF_HWCAP (elf_hwcap) 272 extern unsigned int elf_hwcap; 273 #include <asm/hwcap.h> 274 275 /* 276 * This yields a string that ld.so will use to load implementation 277 * specific libraries for optimization. This is more specific in 278 * intent than poking at uname or /proc/cpuinfo. 279 */ 280 281 #define ELF_PLATFORM __elf_platform 282 extern const char *__elf_platform; 283 284 #define ELF_PLAT_INIT(_r, load_addr) do { \ 285 _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0; \ 286 _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0; \ 287 _r->regs[9] = _r->regs[10] = _r->regs[11] = _r->regs[12] = 0; \ 288 _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0; \ 289 _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0; \ 290 _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0; \ 291 _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0; \ 292 _r->regs[29] = _r->regs[30] = _r->regs[31] = 0; \ 293 } while (0) 294 295 /* 296 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 297 * use of this is to invoke "./ld.so someprog" to test out a new version of 298 * the loader. We need to make sure that it is out of the way of the program 299 * that it will "exec", and that there is sufficient room for the brk. 300 */ 301 302 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 303 304 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 305 #define ARCH_DLINFO \ 306 do { \ 307 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 308 (unsigned long)current->mm->context.vdso); \ 309 } while (0) 310 311 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 312 struct linux_binprm; 313 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 314 int uses_interp); 315 316 struct arch_elf_state { 317 int fp_abi; 318 int interp_fp_abi; 319 }; 320 321 #define LOONGARCH_ABI_FP_ANY (0) 322 323 #define INIT_ARCH_ELF_STATE { \ 324 .fp_abi = LOONGARCH_ABI_FP_ANY, \ 325 .interp_fp_abi = LOONGARCH_ABI_FP_ANY, \ 326 } 327 328 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, 329 bool is_interp, struct arch_elf_state *state); 330 331 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr, 332 struct arch_elf_state *state); 333 334 extern void loongarch_set_personality_fcsr(struct arch_elf_state *state); 335 336 #endif /* _ASM_ELF_H */ 337