arch/arm64/include/asm/elf.h

   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 typedef unsigned long elf_greg_t;
  28
  29 #define ELF_NGREG (sizeof(struct user_pt_regs) / sizeof(elf_greg_t))
  30 #define ELF_CORE_COPY_REGS(dest, regs)  \
  31         *(struct user_pt_regs *)&(dest) = (regs)->user_regs;
  32
  33 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  34 typedef struct user_fpsimd_state elf_fpregset_t;
  35
  36 /*
  37  * AArch64 static relocation types.
  38  */
  39
  40 /* Miscellaneous. */
  41 #define R_ARM_NONE                      0
  42 #define R_AARCH64_NONE                  256
  43
  44 /* Data. */
  45 #define R_AARCH64_ABS64                 257
  46 #define R_AARCH64_ABS32                 258
  47 #define R_AARCH64_ABS16                 259
  48 #define R_AARCH64_PREL64                260
  49 #define R_AARCH64_PREL32                261
  50 #define R_AARCH64_PREL16                262
  51
  52 /* Instructions. */
  53 #define R_AARCH64_MOVW_UABS_G0          263
  54 #define R_AARCH64_MOVW_UABS_G0_NC       264
  55 #define R_AARCH64_MOVW_UABS_G1          265
  56 #define R_AARCH64_MOVW_UABS_G1_NC       266
  57 #define R_AARCH64_MOVW_UABS_G2          267
  58 #define R_AARCH64_MOVW_UABS_G2_NC       268
  59 #define R_AARCH64_MOVW_UABS_G3          269
  60
  61 #define R_AARCH64_MOVW_SABS_G0          270
  62 #define R_AARCH64_MOVW_SABS_G1          271
  63 #define R_AARCH64_MOVW_SABS_G2          272
  64
  65 #define R_AARCH64_LD_PREL_LO19          273
  66 #define R_AARCH64_ADR_PREL_LO21         274
  67 #define R_AARCH64_ADR_PREL_PG_HI21      275
  68 #define R_AARCH64_ADR_PREL_PG_HI21_NC   276
  69 #define R_AARCH64_ADD_ABS_LO12_NC       277
  70 #define R_AARCH64_LDST8_ABS_LO12_NC     278
  71
  72 #define R_AARCH64_TSTBR14               279
  73 #define R_AARCH64_CONDBR19              280
  74 #define R_AARCH64_JUMP26                282
  75 #define R_AARCH64_CALL26                283
  76 #define R_AARCH64_LDST16_ABS_LO12_NC    284
  77 #define R_AARCH64_LDST32_ABS_LO12_NC    285
  78 #define R_AARCH64_LDST64_ABS_LO12_NC    286
  79 #define R_AARCH64_LDST128_ABS_LO12_NC   299
  80
  81 #define R_AARCH64_MOVW_PREL_G0          287
  82 #define R_AARCH64_MOVW_PREL_G0_NC       288
  83 #define R_AARCH64_MOVW_PREL_G1          289
  84 #define R_AARCH64_MOVW_PREL_G1_NC       290
  85 #define R_AARCH64_MOVW_PREL_G2          291
  86 #define R_AARCH64_MOVW_PREL_G2_NC       292
  87 #define R_AARCH64_MOVW_PREL_G3          293
  88
  89 /*
  90  * These are used to set parameters in the core dumps.
  91  */
  92 #define ELF_CLASS       ELFCLASS64
  93 #ifdef __AARCH64EB__
  94 #define ELF_DATA        ELFDATA2MSB
  95 #else
  96 #define ELF_DATA        ELFDATA2LSB
  97 #endif
  98 #define ELF_ARCH        EM_AARCH64
  99
 100 /*
 101  * This yields a string that ld.so will use to load implementation
 102  * specific libraries for optimization.  This is more specific in
 103  * intent than poking at uname or /proc/cpuinfo.
 104  */
 105 #define ELF_PLATFORM_SIZE       16
 106 #ifdef __AARCH64EB__
 107 #define ELF_PLATFORM            ("aarch64_be")
 108 #else
 109 #define ELF_PLATFORM            ("aarch64")
 110 #endif
 111
 112 /*
 113  * This is used to ensure we don't load something for the wrong architecture.
 114  */
 115 #define elf_check_arch(x)               ((x)->e_machine == EM_AARCH64)
 116
 117 #define elf_read_implies_exec(ex,stk)   (stk != EXSTACK_DISABLE_X)
 118
 119 #define CORE_DUMP_USE_REGSET
 120 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 121
 122 /*
 123  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 124  * use of this is to invoke "./ld.so someprog" to test out a new version of
 125  * the loader.  We need to make sure that it is out of the way of the program
 126  * that it will "exec", and that there is sufficient room for the brk.
 127  */
 128 #define ELF_ET_DYN_BASE (2 * TASK_SIZE_64 / 3)
 129
 130 /*
 131  * When the program starts, a1 contains a pointer to a function to be
 132  * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
 133  * such handler.
 134  */
 135 #define ELF_PLAT_INIT(_r, load_addr)    (_r)->regs[0] = 0
 136
 137 #define SET_PERSONALITY(ex)             clear_thread_flag(TIF_32BIT);
 138
 139 #define ARCH_DLINFO                                                     \
 140 do {                                                                    \
 141         NEW_AUX_ENT(AT_SYSINFO_EHDR,                                    \
 142                     (elf_addr_t)current->mm->context.vdso);             \
 143 } while (0)
 144
 145 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
 146 struct linux_binprm;
 147 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 148                                        int uses_interp);
 149
 150 /* 1GB of VA */
 151 #ifdef CONFIG_COMPAT
 152 #define STACK_RND_MASK                  (test_thread_flag(TIF_32BIT) ? \
 153                                                 0x7ff >> (PAGE_SHIFT - 12) : \
 154                                                 0x3ffff >> (PAGE_SHIFT - 12))
 155 #else
 156 #define STACK_RND_MASK                  (0x3ffff >> (PAGE_SHIFT - 12))
 157 #endif
 158
 159 #ifdef CONFIG_COMPAT
 160
 161 #ifdef __AARCH64EB__
 162 #define COMPAT_ELF_PLATFORM             ("v8b")
 163 #else
 164 #define COMPAT_ELF_PLATFORM             ("v8l")
 165 #endif
 166
 167 #define COMPAT_ELF_ET_DYN_BASE          (2 * TASK_SIZE_32 / 3)
 168
 169 /* AArch32 registers. */
 170 #define COMPAT_ELF_NGREG                18
 171 typedef unsigned int                    compat_elf_greg_t;
 172 typedef compat_elf_greg_t               compat_elf_gregset_t[COMPAT_ELF_NGREG];
 173
 174 /* AArch32 EABI. */
 175 #define EF_ARM_EABI_MASK                0xff000000
 176 #define compat_elf_check_arch(x)        (((x)->e_machine == EM_ARM) && \
 177                                          ((x)->e_flags & EF_ARM_EABI_MASK))
 178
 179 #define compat_start_thread             compat_start_thread
 180 #define COMPAT_SET_PERSONALITY(ex)      set_thread_flag(TIF_32BIT);
 181 #define COMPAT_ARCH_DLINFO
 182 extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
 183                                       int uses_interp);
 184 #define compat_arch_setup_additional_pages \
 185                                         aarch32_setup_vectors_page
 186
 187 #endif /* CONFIG_COMPAT */
 188
 189 #endif