1 /* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 #ifndef __ASM_ELF_H 17 #define __ASM_ELF_H 18 19 #include <asm/hwcap.h> 20 21 /* 22 * ELF register definitions.. 23 */ 24 #include <asm/ptrace.h> 25 #include <asm/user.h> 26 27 /* 28 * AArch64 static relocation types. 29 */ 30 31 /* Miscellaneous. */ 32 #define R_ARM_NONE 0 33 #define R_AARCH64_NONE 256 34 35 /* Data. */ 36 #define R_AARCH64_ABS64 257 37 #define R_AARCH64_ABS32 258 38 #define R_AARCH64_ABS16 259 39 #define R_AARCH64_PREL64 260 40 #define R_AARCH64_PREL32 261 41 #define R_AARCH64_PREL16 262 42 43 /* Instructions. */ 44 #define R_AARCH64_MOVW_UABS_G0 263 45 #define R_AARCH64_MOVW_UABS_G0_NC 264 46 #define R_AARCH64_MOVW_UABS_G1 265 47 #define R_AARCH64_MOVW_UABS_G1_NC 266 48 #define R_AARCH64_MOVW_UABS_G2 267 49 #define R_AARCH64_MOVW_UABS_G2_NC 268 50 #define R_AARCH64_MOVW_UABS_G3 269 51 52 #define R_AARCH64_MOVW_SABS_G0 270 53 #define R_AARCH64_MOVW_SABS_G1 271 54 #define R_AARCH64_MOVW_SABS_G2 272 55 56 #define R_AARCH64_LD_PREL_LO19 273 57 #define R_AARCH64_ADR_PREL_LO21 274 58 #define R_AARCH64_ADR_PREL_PG_HI21 275 59 #define R_AARCH64_ADR_PREL_PG_HI21_NC 276 60 #define R_AARCH64_ADD_ABS_LO12_NC 277 61 #define R_AARCH64_LDST8_ABS_LO12_NC 278 62 63 #define R_AARCH64_TSTBR14 279 64 #define R_AARCH64_CONDBR19 280 65 #define R_AARCH64_JUMP26 282 66 #define R_AARCH64_CALL26 283 67 #define R_AARCH64_LDST16_ABS_LO12_NC 284 68 #define R_AARCH64_LDST32_ABS_LO12_NC 285 69 #define R_AARCH64_LDST64_ABS_LO12_NC 286 70 #define R_AARCH64_LDST128_ABS_LO12_NC 299 71 72 #define R_AARCH64_MOVW_PREL_G0 287 73 #define R_AARCH64_MOVW_PREL_G0_NC 288 74 #define R_AARCH64_MOVW_PREL_G1 289 75 #define R_AARCH64_MOVW_PREL_G1_NC 290 76 #define R_AARCH64_MOVW_PREL_G2 291 77 #define R_AARCH64_MOVW_PREL_G2_NC 292 78 #define R_AARCH64_MOVW_PREL_G3 293 79 80 #define R_AARCH64_RELATIVE 1027 81 82 /* 83 * These are used to set parameters in the core dumps. 84 */ 85 #define ELF_CLASS ELFCLASS64 86 #ifdef __AARCH64EB__ 87 #define ELF_DATA ELFDATA2MSB 88 #else 89 #define ELF_DATA ELFDATA2LSB 90 #endif 91 #define ELF_ARCH EM_AARCH64 92 93 /* 94 * This yields a string that ld.so will use to load implementation 95 * specific libraries for optimization. This is more specific in 96 * intent than poking at uname or /proc/cpuinfo. 97 */ 98 #define ELF_PLATFORM_SIZE 16 99 #ifdef __AARCH64EB__ 100 #define ELF_PLATFORM ("aarch64_be") 101 #else 102 #define ELF_PLATFORM ("aarch64") 103 #endif 104 105 /* 106 * This is used to ensure we don't load something for the wrong architecture. 107 */ 108 #define elf_check_arch(x) ((x)->e_machine == EM_AARCH64) 109 110 #define elf_read_implies_exec(ex,stk) (stk != EXSTACK_DISABLE_X) 111 112 #define CORE_DUMP_USE_REGSET 113 #define ELF_EXEC_PAGESIZE PAGE_SIZE 114 115 /* 116 * This is the base location for PIE (ET_DYN with INTERP) loads. On 117 * 64-bit, this is above 4GB to leave the entire 32-bit address 118 * space open for things that want to use the area for 32-bit pointers. 119 */ 120 #ifdef CONFIG_ARM64_FORCE_52BIT 121 #define ELF_ET_DYN_BASE (2 * TASK_SIZE_64 / 3) 122 #else 123 #define ELF_ET_DYN_BASE (2 * DEFAULT_MAP_WINDOW_64 / 3) 124 #endif /* CONFIG_ARM64_FORCE_52BIT */ 125 126 #ifndef __ASSEMBLY__ 127 128 #include <linux/bug.h> 129 #include <asm/processor.h> /* for signal_minsigstksz, used by ARCH_DLINFO */ 130 131 typedef unsigned long elf_greg_t; 132 133 #define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t)) 134 #define ELF_CORE_COPY_REGS(dest, regs) \ 135 *(struct user_pt_regs *)&(dest) = (regs)->user_regs; 136 137 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 138 typedef struct user_fpsimd_state elf_fpregset_t; 139 140 /* 141 * When the program starts, a1 contains a pointer to a function to be 142 * registered with atexit, as per the SVR4 ABI. A value of 0 means we have no 143 * such handler. 144 */ 145 #define ELF_PLAT_INIT(_r, load_addr) (_r)->regs[0] = 0 146 147 #define SET_PERSONALITY(ex) \ 148 ({ \ 149 clear_thread_flag(TIF_32BIT); \ 150 current->personality &= ~READ_IMPLIES_EXEC; \ 151 }) 152 153 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 154 #define ARCH_DLINFO \ 155 do { \ 156 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 157 (elf_addr_t)current->mm->context.vdso); \ 158 \ 159 /* \ 160 * Should always be nonzero unless there's a kernel bug. \ 161 * If we haven't determined a sensible value to give to \ 162 * userspace, omit the entry: \ 163 */ \ 164 if (likely(signal_minsigstksz)) \ 165 NEW_AUX_ENT(AT_MINSIGSTKSZ, signal_minsigstksz); \ 166 else \ 167 NEW_AUX_ENT(AT_IGNORE, 0); \ 168 } while (0) 169 170 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 171 struct linux_binprm; 172 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 173 int uses_interp); 174 175 /* 1GB of VA */ 176 #ifdef CONFIG_COMPAT 177 #define STACK_RND_MASK (test_thread_flag(TIF_32BIT) ? \ 178 0x7ff >> (PAGE_SHIFT - 12) : \ 179 0x3ffff >> (PAGE_SHIFT - 12)) 180 #else 181 #define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12)) 182 #endif 183 184 #ifdef __AARCH64EB__ 185 #define COMPAT_ELF_PLATFORM ("v8b") 186 #else 187 #define COMPAT_ELF_PLATFORM ("v8l") 188 #endif 189 190 #ifdef CONFIG_COMPAT 191 192 /* PIE load location for compat arm. Must match ARM ELF_ET_DYN_BASE. */ 193 #define COMPAT_ELF_ET_DYN_BASE 0x000400000UL 194 195 /* AArch32 registers. */ 196 #define COMPAT_ELF_NGREG 18 197 typedef unsigned int compat_elf_greg_t; 198 typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; 199 200 /* AArch32 EABI. */ 201 #define EF_ARM_EABI_MASK 0xff000000 202 #define compat_elf_check_arch(x) (system_supports_32bit_el0() && \ 203 ((x)->e_machine == EM_ARM) && \ 204 ((x)->e_flags & EF_ARM_EABI_MASK)) 205 206 #define compat_start_thread compat_start_thread 207 /* 208 * Unlike the native SET_PERSONALITY macro, the compat version maintains 209 * READ_IMPLIES_EXEC across an execve() since this is the behaviour on 210 * arch/arm/. 211 */ 212 #define COMPAT_SET_PERSONALITY(ex) \ 213 ({ \ 214 set_thread_flag(TIF_32BIT); \ 215 }) 216 #define COMPAT_ARCH_DLINFO 217 extern int aarch32_setup_additional_pages(struct linux_binprm *bprm, 218 int uses_interp); 219 #define compat_arch_setup_additional_pages \ 220 aarch32_setup_additional_pages 221 222 #endif /* CONFIG_COMPAT */ 223 224 #endif /* !__ASSEMBLY__ */ 225 226 #endif 227