arch/loongarch/include/asm/elf.h

   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 #define R_LARCH_DELETE                          101
 115 #define R_LARCH_ALIGN                           102
 116 #define R_LARCH_PCREL20_S2                      103
 117 #define R_LARCH_CFA                             104
 118 #define R_LARCH_ADD6                            105
 119 #define R_LARCH_SUB6                            106
 120 #define R_LARCH_ADD_ULEB128                     107
 121 #define R_LARCH_SUB_ULEB128                     108
 122 #define R_LARCH_64_PCREL                        109
 123
 124 #ifndef ELF_ARCH
 125
 126 /* ELF register definitions */
 127
 128 /*
 129  * General purpose have the following registers:
 130  *      Register        Number
 131  *      GPRs            32
 132  *      ORIG_A0         1
 133  *      ERA             1
 134  *      BADVADDR        1
 135  *      CRMD            1
 136  *      PRMD            1
 137  *      EUEN            1
 138  *      ECFG            1
 139  *      ESTAT           1
 140  *      Reserved        5
 141  */
 142 #define ELF_NGREG       45
 143
 144 /*
 145  * Floating point have the following registers:
 146  *      Register        Number
 147  *      FPR             32
 148  *      FCC             1
 149  *      FCSR            1
 150  */
 151 #define ELF_NFPREG      34
 152
 153 typedef unsigned long elf_greg_t;
 154 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 155
 156 typedef double elf_fpreg_t;
 157 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
 158
 159 void loongarch_dump_regs64(u64 *uregs, const struct pt_regs *regs);
 160
 161 #ifdef CONFIG_32BIT
 162 /*
 163  * This is used to ensure we don't load something for the wrong architecture.
 164  */
 165 #define elf_check_arch elf32_check_arch
 166
 167 /*
 168  * These are used to set parameters in the core dumps.
 169  */
 170 #define ELF_CLASS       ELFCLASS32
 171
 172 #define ELF_CORE_COPY_REGS(dest, regs) \
 173         loongarch_dump_regs32((u32 *)&(dest), (regs));
 174
 175 #endif /* CONFIG_32BIT */
 176
 177 #ifdef CONFIG_64BIT
 178 /*
 179  * This is used to ensure we don't load something for the wrong architecture.
 180  */
 181 #define elf_check_arch elf64_check_arch
 182
 183 /*
 184  * These are used to set parameters in the core dumps.
 185  */
 186 #define ELF_CLASS       ELFCLASS64
 187
 188 #define ELF_CORE_COPY_REGS(dest, regs) \
 189         loongarch_dump_regs64((u64 *)&(dest), (regs));
 190
 191 #endif /* CONFIG_64BIT */
 192
 193 /*
 194  * These are used to set parameters in the core dumps.
 195  */
 196 #define ELF_DATA        ELFDATA2LSB
 197 #define ELF_ARCH        EM_LOONGARCH
 198
 199 #endif /* !defined(ELF_ARCH) */
 200
 201 #define loongarch_elf_check_machine(x) ((x)->e_machine == EM_LOONGARCH)
 202
 203 #define vmcore_elf32_check_arch loongarch_elf_check_machine
 204 #define vmcore_elf64_check_arch loongarch_elf_check_machine
 205
 206 /*
 207  * Return non-zero if HDR identifies an 32bit ELF binary.
 208  */
 209 #define elf32_check_arch(hdr)                                           \
 210 ({                                                                      \
 211         int __res = 1;                                                  \
 212         struct elfhdr *__h = (hdr);                                     \
 213                                                                         \
 214         if (!loongarch_elf_check_machine(__h))                          \
 215                 __res = 0;                                              \
 216         if (__h->e_ident[EI_CLASS] != ELFCLASS32)                       \
 217                 __res = 0;                                              \
 218                                                                         \
 219         __res;                                                          \
 220 })
 221
 222 /*
 223  * Return non-zero if HDR identifies an 64bit ELF binary.
 224  */
 225 #define elf64_check_arch(hdr)                                           \
 226 ({                                                                      \
 227         int __res = 1;                                                  \
 228         struct elfhdr *__h = (hdr);                                     \
 229                                                                         \
 230         if (!loongarch_elf_check_machine(__h))                          \
 231                 __res = 0;                                              \
 232         if (__h->e_ident[EI_CLASS] != ELFCLASS64)                       \
 233                 __res = 0;                                              \
 234                                                                         \
 235         __res;                                                          \
 236 })
 237
 238 #ifdef CONFIG_32BIT
 239
 240 #define SET_PERSONALITY2(ex, state)                                     \
 241 do {                                                                    \
 242         current->thread.vdso = &vdso_info;                              \
 243                                                                         \
 244         loongarch_set_personality_fcsr(state);                          \
 245                                                                         \
 246         if (personality(current->personality) != PER_LINUX)             \
 247                 set_personality(PER_LINUX);                             \
 248 } while (0)
 249
 250 #endif /* CONFIG_32BIT */
 251
 252 #ifdef CONFIG_64BIT
 253
 254 #define SET_PERSONALITY2(ex, state)                                     \
 255 do {                                                                    \
 256         unsigned int p;                                                 \
 257                                                                         \
 258         clear_thread_flag(TIF_32BIT_REGS);                              \
 259         clear_thread_flag(TIF_32BIT_ADDR);                              \
 260                                                                         \
 261         current->thread.vdso = &vdso_info;                              \
 262         loongarch_set_personality_fcsr(state);                          \
 263                                                                         \
 264         p = personality(current->personality);                          \
 265         if (p != PER_LINUX32 && p != PER_LINUX)                         \
 266                 set_personality(PER_LINUX);                             \
 267 } while (0)
 268
 269 #endif /* CONFIG_64BIT */
 270
 271 #define CORE_DUMP_USE_REGSET
 272 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 273
 274 /*
 275  * This yields a mask that user programs can use to figure out what
 276  * instruction set this cpu supports. This could be done in userspace,
 277  * but it's not easy, and we've already done it here.
 278  */
 279
 280 #define ELF_HWCAP       (elf_hwcap)
 281 extern unsigned int elf_hwcap;
 282 #include <asm/hwcap.h>
 283
 284 /*
 285  * This yields a string that ld.so will use to load implementation
 286  * specific libraries for optimization.  This is more specific in
 287  * intent than poking at uname or /proc/cpuinfo.
 288  */
 289
 290 #define ELF_PLATFORM  __elf_platform
 291 extern const char *__elf_platform;
 292
 293 #define ELF_PLAT_INIT(_r, load_addr)    do { \
 294         _r->regs[1] = _r->regs[2] = _r->regs[3] = _r->regs[4] = 0;      \
 295         _r->regs[5] = _r->regs[6] = _r->regs[7] = _r->regs[8] = 0;      \
 296         _r->regs[9] = _r->regs[10] /* syscall n */ = _r->regs[12] = 0;  \
 297         _r->regs[13] = _r->regs[14] = _r->regs[15] = _r->regs[16] = 0;  \
 298         _r->regs[17] = _r->regs[18] = _r->regs[19] = _r->regs[20] = 0;  \
 299         _r->regs[21] = _r->regs[22] = _r->regs[23] = _r->regs[24] = 0;  \
 300         _r->regs[25] = _r->regs[26] = _r->regs[27] = _r->regs[28] = 0;  \
 301         _r->regs[29] = _r->regs[30] = _r->regs[31] = 0;                 \
 302 } while (0)
 303
 304 /*
 305  * This is the location that an ET_DYN program is loaded if exec'ed. Typical
 306  * use of this is to invoke "./ld.so someprog" to test out a new version of
 307  * the loader. We need to make sure that it is out of the way of the program
 308  * that it will "exec", and that there is sufficient room for the brk.
 309  */
 310
 311 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
 312
 313 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 314 #define ARCH_DLINFO                                                     \
 315 do {                                                                    \
 316         NEW_AUX_ENT(AT_SYSINFO_EHDR,                                    \
 317                     (unsigned long)current->mm->context.vdso);          \
 318 } while (0)
 319
 320 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 321 struct linux_binprm;
 322 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 323                                        int uses_interp);
 324
 325 struct arch_elf_state {
 326         int fp_abi;
 327         int interp_fp_abi;
 328 };
 329
 330 #define LOONGARCH_ABI_FP_ANY    (0)
 331
 332 #define INIT_ARCH_ELF_STATE {                   \
 333         .fp_abi = LOONGARCH_ABI_FP_ANY,         \
 334         .interp_fp_abi = LOONGARCH_ABI_FP_ANY,  \
 335 }
 336
 337 extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf,
 338                             bool is_interp, struct arch_elf_state *state);
 339
 340 extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
 341                           struct arch_elf_state *state);
 342
 343 extern void loongarch_set_personality_fcsr(struct arch_elf_state *state);
 344
 345 #endif /* _ASM_ELF_H */