linux/arch/arm/include/asm/elf.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASMARM_ELF_H
   3#define __ASMARM_ELF_H
   4
   5#include <asm/auxvec.h>
   6#include <asm/hwcap.h>
   7#include <asm/vdso_datapage.h>
   8
   9/*
  10 * ELF register definitions..
  11 */
  12#include <asm/ptrace.h>
  13#include <asm/user.h>
  14
  15struct task_struct;
  16
  17typedef unsigned long elf_greg_t;
  18typedef unsigned long elf_freg_t[3];
  19
  20#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
  21typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  22
  23typedef struct user_fp elf_fpregset_t;
  24
  25#define EF_ARM_EABI_MASK        0xff000000
  26#define EF_ARM_EABI_UNKNOWN     0x00000000
  27#define EF_ARM_EABI_VER1        0x01000000
  28#define EF_ARM_EABI_VER2        0x02000000
  29#define EF_ARM_EABI_VER3        0x03000000
  30#define EF_ARM_EABI_VER4        0x04000000
  31#define EF_ARM_EABI_VER5        0x05000000
  32
  33#define EF_ARM_BE8              0x00800000      /* ABI 4,5 */
  34#define EF_ARM_LE8              0x00400000      /* ABI 4,5 */
  35#define EF_ARM_MAVERICK_FLOAT   0x00000800      /* ABI 0 */
  36#define EF_ARM_VFP_FLOAT        0x00000400      /* ABI 0 */
  37#define EF_ARM_SOFT_FLOAT       0x00000200      /* ABI 0 */
  38#define EF_ARM_OLD_ABI          0x00000100      /* ABI 0 */
  39#define EF_ARM_NEW_ABI          0x00000080      /* ABI 0 */
  40#define EF_ARM_ALIGN8           0x00000040      /* ABI 0 */
  41#define EF_ARM_PIC              0x00000020      /* ABI 0 */
  42#define EF_ARM_MAPSYMSFIRST     0x00000010      /* ABI 2 */
  43#define EF_ARM_APCS_FLOAT       0x00000010      /* ABI 0, floats in fp regs */
  44#define EF_ARM_DYNSYMSUSESEGIDX 0x00000008      /* ABI 2 */
  45#define EF_ARM_APCS_26          0x00000008      /* ABI 0 */
  46#define EF_ARM_SYMSARESORTED    0x00000004      /* ABI 1,2 */
  47#define EF_ARM_INTERWORK        0x00000004      /* ABI 0 */
  48#define EF_ARM_HASENTRY         0x00000002      /* All */
  49#define EF_ARM_RELEXEC          0x00000001      /* All */
  50
  51#define R_ARM_NONE              0
  52#define R_ARM_PC24              1
  53#define R_ARM_ABS32             2
  54#define R_ARM_REL32             3
  55#define R_ARM_CALL              28
  56#define R_ARM_JUMP24            29
  57#define R_ARM_TARGET1           38
  58#define R_ARM_V4BX              40
  59#define R_ARM_PREL31            42
  60#define R_ARM_MOVW_ABS_NC       43
  61#define R_ARM_MOVT_ABS          44
  62#define R_ARM_MOVW_PREL_NC      45
  63#define R_ARM_MOVT_PREL         46
  64
  65#define R_ARM_THM_CALL          10
  66#define R_ARM_THM_JUMP24        30
  67#define R_ARM_THM_MOVW_ABS_NC   47
  68#define R_ARM_THM_MOVT_ABS      48
  69#define R_ARM_THM_MOVW_PREL_NC  49
  70#define R_ARM_THM_MOVT_PREL     50
  71
  72/*
  73 * These are used to set parameters in the core dumps.
  74 */
  75#define ELF_CLASS       ELFCLASS32
  76#ifdef __ARMEB__
  77#define ELF_DATA        ELFDATA2MSB
  78#else
  79#define ELF_DATA        ELFDATA2LSB
  80#endif
  81#define ELF_ARCH        EM_ARM
  82
  83/*
  84 * This yields a string that ld.so will use to load implementation
  85 * specific libraries for optimization.  This is more specific in
  86 * intent than poking at uname or /proc/cpuinfo.
  87 *
  88 * For now we just provide a fairly general string that describes the
  89 * processor family.  This could be made more specific later if someone
  90 * implemented optimisations that require it.  26-bit CPUs give you
  91 * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
  92 * supported).  32-bit CPUs give you "v3[lb]" for anything based on an
  93 * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
  94 * core.
  95 */
  96#define ELF_PLATFORM_SIZE 8
  97#define ELF_PLATFORM    (elf_platform)
  98
  99extern char elf_platform[];
 100
 101struct elf32_hdr;
 102
 103/*
 104 * This is used to ensure we don't load something for the wrong architecture.
 105 */
 106extern int elf_check_arch(const struct elf32_hdr *);
 107#define elf_check_arch elf_check_arch
 108
 109#define ELFOSABI_ARM_FDPIC  65  /* ARM FDPIC platform */
 110#define elf_check_fdpic(x)  ((x)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
 111#define elf_check_const_displacement(x)  ((x)->e_flags & EF_ARM_PIC)
 112#define ELF_FDPIC_CORE_EFLAGS  0
 113
 114#define vmcore_elf64_check_arch(x) (0)
 115
 116extern int arm_elf_read_implies_exec(int);
 117#define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(stk)
 118
 119#define CORE_DUMP_USE_REGSET
 120#define ELF_EXEC_PAGESIZE       4096
 121
 122/* This is the base location for PIE (ET_DYN with INTERP) loads. */
 123#define ELF_ET_DYN_BASE         0x400000UL
 124
 125/* When the program starts, a1 contains a pointer to a function to be 
 126   registered with atexit, as per the SVR4 ABI.  A value of 0 means we 
 127   have no such handler.  */
 128#define ELF_PLAT_INIT(_r, load_addr)    (_r)->ARM_r0 = 0
 129
 130#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
 131        do { \
 132                (_r)->ARM_r7 = _exec_map_addr; \
 133                (_r)->ARM_r8 = _interp_map_addr; \
 134                (_r)->ARM_r9 = dynamic_addr; \
 135        } while(0)
 136
 137extern void elf_set_personality(const struct elf32_hdr *);
 138#define SET_PERSONALITY(ex)     elf_set_personality(&(ex))
 139
 140#ifdef CONFIG_MMU
 141#ifdef CONFIG_VDSO
 142#define ARCH_DLINFO                                             \
 143do {                                                            \
 144        NEW_AUX_ENT(AT_SYSINFO_EHDR,                            \
 145                    (elf_addr_t)current->mm->context.vdso);     \
 146} while (0)
 147#endif
 148#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 149struct linux_binprm;
 150int arch_setup_additional_pages(struct linux_binprm *, int);
 151#endif
 152
 153#endif
 154