elf.h

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/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_ELF_H
#define __ASM_ELF_H

#include <asm/hwcap.h>

/*
 * ELF register definitions..
 */
#include <asm/ptrace.h>
#include <asm/user.h>

typedef unsigned long elf_greg_t;

#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef struct user_fpsimd_state elf_fpregset_t;

#define EM_AARCH64      183

/*
 * AArch64 static relocation types.
 */

/* Miscellaneous. */
#define R_ARM_NONE          0
#define R_AARCH64_NONE          256

/* Data. */
#define R_AARCH64_ABS64         257
#define R_AARCH64_ABS32         258
#define R_AARCH64_ABS16         259
#define R_AARCH64_PREL64        260
#define R_AARCH64_PREL32        261
#define R_AARCH64_PREL16        262

/* Instructions. */
#define R_AARCH64_MOVW_UABS_G0      263
#define R_AARCH64_MOVW_UABS_G0_NC   264
#define R_AARCH64_MOVW_UABS_G1      265
#define R_AARCH64_MOVW_UABS_G1_NC   266
#define R_AARCH64_MOVW_UABS_G2      267
#define R_AARCH64_MOVW_UABS_G2_NC   268
#define R_AARCH64_MOVW_UABS_G3      269

#define R_AARCH64_MOVW_SABS_G0      270
#define R_AARCH64_MOVW_SABS_G1      271
#define R_AARCH64_MOVW_SABS_G2      272

#define R_AARCH64_LD_PREL_LO19      273
#define R_AARCH64_ADR_PREL_LO21     274
#define R_AARCH64_ADR_PREL_PG_HI21  275
#define R_AARCH64_ADR_PREL_PG_HI21_NC   276
#define R_AARCH64_ADD_ABS_LO12_NC   277
#define R_AARCH64_LDST8_ABS_LO12_NC 278

#define R_AARCH64_TSTBR14       279
#define R_AARCH64_CONDBR19      280
#define R_AARCH64_JUMP26        282
#define R_AARCH64_CALL26        283
#define R_AARCH64_LDST16_ABS_LO12_NC    284
#define R_AARCH64_LDST32_ABS_LO12_NC    285
#define R_AARCH64_LDST64_ABS_LO12_NC    286
#define R_AARCH64_LDST128_ABS_LO12_NC   299

#define R_AARCH64_MOVW_PREL_G0      287
#define R_AARCH64_MOVW_PREL_G0_NC   288
#define R_AARCH64_MOVW_PREL_G1      289
#define R_AARCH64_MOVW_PREL_G1_NC   290
#define R_AARCH64_MOVW_PREL_G2      291
#define R_AARCH64_MOVW_PREL_G2_NC   292
#define R_AARCH64_MOVW_PREL_G3      293

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS   ELFCLASS64
#define ELF_DATA    ELFDATA2LSB
#define ELF_ARCH    EM_AARCH64

#define ELF_PLATFORM_SIZE   16
#define ELF_PLATFORM        ("aarch64")

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x)       ((x)->e_machine == EM_AARCH64)

#define elf_read_implies_exec(ex,stk)   (stk != EXSTACK_DISABLE_X)

#define CORE_DUMP_USE_REGSET
#define ELF_EXEC_PAGESIZE   PAGE_SIZE

/*
 * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 * use of this is to invoke "./ld.so someprog" to test out a new version of
 * the loader.  We need to make sure that it is out of the way of the program
 * that it will "exec", and that there is sufficient room for the brk.
 */
extern unsigned long randomize_et_dyn(unsigned long base);
#define ELF_ET_DYN_BASE (randomize_et_dyn(2 * TASK_SIZE_64 / 3))

/*
 * When the program starts, a1 contains a pointer to a function to be
 * registered with atexit, as per the SVR4 ABI.  A value of 0 means we have no
 * such handler.
 */
#define ELF_PLAT_INIT(_r, load_addr)    (_r)->regs[0] = 0

#define SET_PERSONALITY(ex)     clear_thread_flag(TIF_32BIT);

#define ARCH_DLINFO                         \
do {                                    \
    NEW_AUX_ENT(AT_SYSINFO_EHDR,                    \
            (elf_addr_t)current->mm->context.vdso);     \
} while (0)

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
                       int uses_interp);

/* 1GB of VA */
#ifdef CONFIG_COMPAT
#define STACK_RND_MASK          (test_thread_flag(TIF_32BIT) ? \
                        0x7ff >> (PAGE_SHIFT - 12) : \
                        0x3ffff >> (PAGE_SHIFT - 12))
#else
#define STACK_RND_MASK          (0x3ffff >> (PAGE_SHIFT - 12))
#endif

struct mm_struct;
extern unsigned long arch_randomize_brk(struct mm_struct *mm);
#define arch_randomize_brk arch_randomize_brk

#ifdef CONFIG_COMPAT
#define EM_ARM              40
#define COMPAT_ELF_PLATFORM     ("v8l")

#define COMPAT_ELF_ET_DYN_BASE      (randomize_et_dyn(2 * TASK_SIZE_32 / 3))

/* AArch32 registers. */
#define COMPAT_ELF_NGREG        18
typedef unsigned int            compat_elf_greg_t;
typedef compat_elf_greg_t       compat_elf_gregset_t[COMPAT_ELF_NGREG];

/* AArch32 EABI. */
#define EF_ARM_EABI_MASK        0xff000000
#define compat_elf_check_arch(x)    (((x)->e_machine == EM_ARM) && \
                     ((x)->e_flags & EF_ARM_EABI_MASK))

#define compat_start_thread     compat_start_thread
#define COMPAT_SET_PERSONALITY(ex)  set_thread_flag(TIF_32BIT);
#define COMPAT_ARCH_DLINFO
extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
                      int uses_interp);
#define compat_arch_setup_additional_pages \
                    aarch32_setup_vectors_page

#endif /* CONFIG_COMPAT */

#endif