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Linux/arch/arm64/include/asm/elf.h

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  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 
125 typedef 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 
131 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
132 typedef 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                                                     \
145 do {                                                                    \
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
151 struct linux_binprm;
152 extern 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
176 typedef unsigned int                    compat_elf_greg_t;
177 typedef 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
188 extern 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 

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