arch/arm/include/asm/elf.h

   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
  15 struct task_struct;
  16
  17 typedef unsigned long elf_greg_t;
  18 typedef unsigned long elf_freg_t[3];
  19
  20 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
  21 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  22
  23 typedef 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_CALL              28
  55 #define R_ARM_JUMP24            29
  56 #define R_ARM_TARGET1           38
  57 #define R_ARM_V4BX              40
  58 #define R_ARM_PREL31            42
  59 #define R_ARM_MOVW_ABS_NC       43
  60 #define R_ARM_MOVT_ABS          44
  61
  62 #define R_ARM_THM_CALL          10
  63 #define R_ARM_THM_JUMP24        30
  64 #define R_ARM_THM_MOVW_ABS_NC   47
  65 #define R_ARM_THM_MOVT_ABS      48
  66
  67 /*
  68  * These are used to set parameters in the core dumps.
  69  */
  70 #define ELF_CLASS       ELFCLASS32
  71 #ifdef __ARMEB__
  72 #define ELF_DATA        ELFDATA2MSB
  73 #else
  74 #define ELF_DATA        ELFDATA2LSB
  75 #endif
  76 #define ELF_ARCH        EM_ARM
  77
  78 /*
  79  * This yields a string that ld.so will use to load implementation
  80  * specific libraries for optimization.  This is more specific in
  81  * intent than poking at uname or /proc/cpuinfo.
  82  *
  83  * For now we just provide a fairly general string that describes the
  84  * processor family.  This could be made more specific later if someone
  85  * implemented optimisations that require it.  26-bit CPUs give you
  86  * "v1l" for ARM2 (no SWP) and "v2l" for anything else (ARM1 isn't
  87  * supported).  32-bit CPUs give you "v3[lb]" for anything based on an
  88  * ARM6 or ARM7 core and "armv4[lb]" for anything based on a StrongARM-1
  89  * core.
  90  */
  91 #define ELF_PLATFORM_SIZE 8
  92 #define ELF_PLATFORM    (elf_platform)
  93
  94 extern char elf_platform[];
  95
  96 struct elf32_hdr;
  97
  98 /*
  99  * This is used to ensure we don't load something for the wrong architecture.
 100  */
 101 extern int elf_check_arch(const struct elf32_hdr *);
 102 #define elf_check_arch elf_check_arch
 103
 104 #define ELFOSABI_ARM_FDPIC  65  /* ARM FDPIC platform */
 105 #define elf_check_fdpic(x)  ((x)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
 106 #define elf_check_const_displacement(x)  ((x)->e_flags & EF_ARM_PIC)
 107 #define ELF_FDPIC_CORE_EFLAGS  0
 108
 109 #define vmcore_elf64_check_arch(x) (0)
 110
 111 extern int arm_elf_read_implies_exec(int);
 112 #define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(stk)
 113
 114 struct task_struct;
 115 int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
 116 #define ELF_CORE_COPY_TASK_REGS dump_task_regs
 117
 118 #define CORE_DUMP_USE_REGSET
 119 #define ELF_EXEC_PAGESIZE       4096
 120
 121 /* This is the base location for PIE (ET_DYN with INTERP) loads. */
 122 #define ELF_ET_DYN_BASE         0x400000UL
 123
 124 /* When the program starts, a1 contains a pointer to a function to be
 125    registered with atexit, as per the SVR4 ABI.  A value of 0 means we
 126    have no such handler.  */
 127 #define ELF_PLAT_INIT(_r, load_addr)    (_r)->ARM_r0 = 0
 128
 129 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
 130         do { \
 131                 (_r)->ARM_r7 = _exec_map_addr; \
 132                 (_r)->ARM_r8 = _interp_map_addr; \
 133                 (_r)->ARM_r9 = dynamic_addr; \
 134         } while(0)
 135
 136 extern void elf_set_personality(const struct elf32_hdr *);
 137 #define SET_PERSONALITY(ex)     elf_set_personality(&(ex))
 138
 139 #ifdef CONFIG_MMU
 140 #ifdef CONFIG_VDSO
 141 #define ARCH_DLINFO                                             \
 142 do {                                                            \
 143         NEW_AUX_ENT(AT_SYSINFO_EHDR,                            \
 144                     (elf_addr_t)current->mm->context.vdso);     \
 145 } while (0)
 146 #endif
 147 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 148 struct linux_binprm;
 149 int arch_setup_additional_pages(struct linux_binprm *, int);
 150 #endif
 151
 152 #endif