arch/sh/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_ELF_H
   3 #define __ASM_SH_ELF_H
   4
   5 #include <linux/utsname.h>
   6 #include <asm/auxvec.h>
   7 #include <asm/ptrace.h>
   8 #include <asm/user.h>
   9
  10 /* ELF header e_flags defines */
  11 #define EF_SH_PIC               0x100   /* -fpic */
  12 #define EF_SH_FDPIC             0x8000  /* -mfdpic */
  13
  14 /* SH (particularly SHcompact) relocation types  */
  15 #define R_SH_NONE               0
  16 #define R_SH_DIR32              1
  17 #define R_SH_REL32              2
  18 #define R_SH_DIR8WPN            3
  19 #define R_SH_IND12W             4
  20 #define R_SH_DIR8WPL            5
  21 #define R_SH_DIR8WPZ            6
  22 #define R_SH_DIR8BP             7
  23 #define R_SH_DIR8W              8
  24 #define R_SH_DIR8L              9
  25 #define R_SH_SWITCH16           25
  26 #define R_SH_SWITCH32           26
  27 #define R_SH_USES               27
  28 #define R_SH_COUNT              28
  29 #define R_SH_ALIGN              29
  30 #define R_SH_CODE               30
  31 #define R_SH_DATA               31
  32 #define R_SH_LABEL              32
  33 #define R_SH_SWITCH8            33
  34 #define R_SH_GNU_VTINHERIT      34
  35 #define R_SH_GNU_VTENTRY        35
  36 #define R_SH_TLS_GD_32          144
  37 #define R_SH_TLS_LD_32          145
  38 #define R_SH_TLS_LDO_32         146
  39 #define R_SH_TLS_IE_32          147
  40 #define R_SH_TLS_LE_32          148
  41 #define R_SH_TLS_DTPMOD32       149
  42 #define R_SH_TLS_DTPOFF32       150
  43 #define R_SH_TLS_TPOFF32        151
  44 #define R_SH_GOT32              160
  45 #define R_SH_PLT32              161
  46 #define R_SH_COPY               162
  47 #define R_SH_GLOB_DAT           163
  48 #define R_SH_JMP_SLOT           164
  49 #define R_SH_RELATIVE           165
  50 #define R_SH_GOTOFF             166
  51 #define R_SH_GOTPC              167
  52
  53 /* FDPIC relocs */
  54 #define R_SH_GOT20              201
  55 #define R_SH_GOTOFF20           202
  56 #define R_SH_GOTFUNCDESC        203
  57 #define R_SH_GOTFUNCDESC20      204
  58 #define R_SH_GOTOFFFUNCDESC     205
  59 #define R_SH_GOTOFFFUNCDESC20   206
  60 #define R_SH_FUNCDESC           207
  61 #define R_SH_FUNCDESC_VALUE     208
  62
  63 /* SHmedia relocs */
  64 #define R_SH_IMM_LOW16          246
  65 #define R_SH_IMM_LOW16_PCREL    247
  66 #define R_SH_IMM_MEDLOW16       248
  67 #define R_SH_IMM_MEDLOW16_PCREL 249
  68 /* Keep this the last entry.  */
  69 #define R_SH_NUM                256
  70
  71 /*
  72  * ELF register definitions..
  73  */
  74
  75 typedef unsigned long elf_greg_t;
  76
  77 #define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
  78 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  79
  80 typedef struct user_fpu_struct elf_fpregset_t;
  81
  82 /*
  83  * These are used to set parameters in the core dumps.
  84  */
  85 #define ELF_CLASS       ELFCLASS32
  86 #ifdef __LITTLE_ENDIAN__
  87 #define ELF_DATA        ELFDATA2LSB
  88 #else
  89 #define ELF_DATA        ELFDATA2MSB
  90 #endif
  91 #define ELF_ARCH        EM_SH
  92
  93 /*
  94  * This is used to ensure we don't load something for the wrong architecture.
  95  */
  96 #define elf_check_arch(x)               ((x)->e_machine == EM_SH)
  97 #define elf_check_fdpic(x)              ((x)->e_flags & EF_SH_FDPIC)
  98 #define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
  99
 100 /*
 101  * Enable dump using regset.
 102  * This covers all of general/DSP/FPU regs.
 103  */
 104 #define CORE_DUMP_USE_REGSET
 105
 106 #define ELF_FDPIC_CORE_EFLAGS   EF_SH_FDPIC
 107 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 108
 109 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 110    use of this is to invoke "./ld.so someprog" to test out a new version of
 111    the loader.  We need to make sure that it is out of the way of the program
 112    that it will "exec", and that there is sufficient room for the brk.  */
 113
 114 #define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)
 115
 116 #define ELF_CORE_COPY_REGS(_dest,_regs)                         \
 117         memcpy((char *) &_dest, (char *) _regs,                 \
 118                sizeof(struct pt_regs));
 119
 120 /* This yields a mask that user programs can use to figure out what
 121    instruction set this CPU supports.  This could be done in user space,
 122    but it's not easy, and we've already done it here.  */
 123
 124 #define ELF_HWCAP       (boot_cpu_data.flags)
 125
 126 /* This yields a string that ld.so will use to load implementation
 127    specific libraries for optimization.  This is more specific in
 128    intent than poking at uname or /proc/cpuinfo.
 129
 130    For the moment, we have only optimizations for the Intel generations,
 131    but that could change... */
 132
 133 #define ELF_PLATFORM    (utsname()->machine)
 134
 135 #define ELF_PLAT_INIT(_r, load_addr) \
 136   do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
 137        _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
 138        _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
 139        _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
 140        _r->sr = SR_FD; } while (0)
 141
 142 #define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr,       \
 143                             _dynamic_addr)                              \
 144 do {                                                                    \
 145         _r->regs[0]     = 0;                                            \
 146         _r->regs[1]     = 0;                                            \
 147         _r->regs[2]     = 0;                                            \
 148         _r->regs[3]     = 0;                                            \
 149         _r->regs[4]     = 0;                                            \
 150         _r->regs[5]     = 0;                                            \
 151         _r->regs[6]     = 0;                                            \
 152         _r->regs[7]     = 0;                                            \
 153         _r->regs[8]     = _exec_map_addr;                               \
 154         _r->regs[9]     = _interp_map_addr;                             \
 155         _r->regs[10]    = _dynamic_addr;                                \
 156         _r->regs[11]    = 0;                                            \
 157         _r->regs[12]    = 0;                                            \
 158         _r->regs[13]    = 0;                                            \
 159         _r->regs[14]    = 0;                                            \
 160         _r->sr          = SR_FD;                                        \
 161 } while (0)
 162
 163 #define SET_PERSONALITY(ex) \
 164         set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
 165
 166 #ifdef CONFIG_VSYSCALL
 167 /* vDSO has arch_setup_additional_pages */
 168 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
 169 struct linux_binprm;
 170 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 171                                        int uses_interp);
 172
 173 extern unsigned int vdso_enabled;
 174 extern void __kernel_vsyscall;
 175
 176 #define VDSO_BASE               ((unsigned long)current->mm->context.vdso)
 177 #define VDSO_SYM(x)             (VDSO_BASE + (unsigned long)(x))
 178
 179 #define VSYSCALL_AUX_ENT                                        \
 180         if (vdso_enabled)                                       \
 181                 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE);        \
 182         else                                                    \
 183                 NEW_AUX_ENT(AT_IGNORE, 0)
 184 #else
 185 #define VSYSCALL_AUX_ENT        NEW_AUX_ENT(AT_IGNORE, 0)
 186 #endif /* CONFIG_VSYSCALL */
 187
 188 #ifdef CONFIG_SH_FPU
 189 #define FPU_AUX_ENT     NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
 190 #else
 191 #define FPU_AUX_ENT     NEW_AUX_ENT(AT_IGNORE, 0)
 192 #endif
 193
 194 extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
 195
 196 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 197 #define ARCH_DLINFO                                             \
 198 do {                                                            \
 199         /* Optional FPU initialization */                       \
 200         FPU_AUX_ENT;                                            \
 201                                                                 \
 202         /* Optional vsyscall entry */                           \
 203         VSYSCALL_AUX_ENT;                                       \
 204                                                                 \
 205         /* Cache desc */                                        \
 206         NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape);        \
 207         NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape);        \
 208         NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape);          \
 209 } while (0)
 210
 211 #endif /* __ASM_SH_ELF_H */