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 location that an ET_DYN program is loaded if exec'ed. Typical 117 * use of this is to invoke "./ld.so someprog" to test out a new version of 118 * the loader. We need to make sure that it is out of the way of the program 119 * that it will "exec", and that there is sufficient room for the brk. 120 */ 121#define ELF_ET_DYN_BASE (2 * TASK_SIZE_64 / 3) 122 123#ifndef __ASSEMBLY__ 124 125typedef unsigned long elf_greg_t; 126 127#define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t)) 128#define ELF_CORE_COPY_REGS(dest, regs) \ 129 *(struct user_pt_regs *)&(dest) = (regs)->user_regs; 130 131typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 132typedef struct user_fpsimd_state elf_fpregset_t; 133 134/* 135 * When the program starts, a1 contains a pointer to a function to be 136 * registered with atexit, as per the SVR4 ABI. A value of 0 means we have no 137 * such handler. 138 */ 139#define ELF_PLAT_INIT(_r, load_addr) (_r)->regs[0] = 0 140 141#define SET_PERSONALITY(ex) clear_thread_flag(TIF_32BIT); 142 143/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 144#define ARCH_DLINFO \ 145do { \ 146 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 147 (elf_addr_t)current->mm->context.vdso); \ 148} while (0) 149 150#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 151struct linux_binprm; 152extern int arch_setup_additional_pages(struct linux_binprm *bprm, 153 int uses_interp); 154 155/* 1GB of VA */ 156#ifdef CONFIG_COMPAT 157#define STACK_RND_MASK (test_thread_flag(TIF_32BIT) ? \ 158 0x7ff >> (PAGE_SHIFT - 12) : \ 159 0x3ffff >> (PAGE_SHIFT - 12)) 160#else 161#define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12)) 162#endif 163 164#ifdef __AARCH64EB__ 165#define COMPAT_ELF_PLATFORM ("v8b") 166#else 167#define COMPAT_ELF_PLATFORM ("v8l") 168#endif 169 170#ifdef CONFIG_COMPAT 171 172#define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3) 173 174/* AArch32 registers. */ 175#define COMPAT_ELF_NGREG 18 176typedef unsigned int compat_elf_greg_t; 177typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; 178 179/* AArch32 EABI. */ 180#define EF_ARM_EABI_MASK 0xff000000 181#define compat_elf_check_arch(x) (system_supports_32bit_el0() && \ 182 ((x)->e_machine == EM_ARM) && \ 183 ((x)->e_flags & EF_ARM_EABI_MASK)) 184 185#define compat_start_thread compat_start_thread 186#define COMPAT_SET_PERSONALITY(ex) set_thread_flag(TIF_32BIT); 187#define COMPAT_ARCH_DLINFO 188extern int aarch32_setup_vectors_page(struct linux_binprm *bprm, 189 int uses_interp); 190#define compat_arch_setup_additional_pages \ 191 aarch32_setup_vectors_page 192 193#endif /* CONFIG_COMPAT */ 194 195#endif /* !__ASSEMBLY__ */ 196 197#endif 198