LXR linux/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
  75typedef unsigned long elf_greg_t;
  76
  77#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
  78typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  79
  80typedef 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#ifdef __KERNEL__
  94/*
  95 * This is used to ensure we don't load something for the wrong architecture.
  96 */
  97#define elf_check_arch(x)               ((x)->e_machine == EM_SH)
  98#define elf_check_fdpic(x)              ((x)->e_flags & EF_SH_FDPIC)
  99#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
 100
 101/*
 102 * Enable dump using regset.
 103 * This covers all of general/DSP/FPU regs.
 104 */
 105#define CORE_DUMP_USE_REGSET
 106
 107#define ELF_FDPIC_CORE_EFLAGS   EF_SH_FDPIC
 108#define ELF_EXEC_PAGESIZE       PAGE_SIZE
 109
 110/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 111   use of this is to invoke "./ld.so someprog" to test out a new version of
 112   the loader.  We need to make sure that it is out of the way of the program
 113   that it will "exec", and that there is sufficient room for the brk.  */
 114
 115#define ELF_ET_DYN_BASE         (2 * TASK_SIZE / 3)
 116
 117#define ELF_CORE_COPY_REGS(_dest,_regs)                         \
 118        memcpy((char *) &_dest, (char *) _regs,                 \
 119               sizeof(struct pt_regs));
 120
 121/* This yields a mask that user programs can use to figure out what
 122   instruction set this CPU supports.  This could be done in user space,
 123   but it's not easy, and we've already done it here.  */
 124
 125#define ELF_HWCAP       (boot_cpu_data.flags)
 126
 127/* This yields a string that ld.so will use to load implementation
 128   specific libraries for optimization.  This is more specific in
 129   intent than poking at uname or /proc/cpuinfo.
 130
 131   For the moment, we have only optimizations for the Intel generations,
 132   but that could change... */
 133
 134#define ELF_PLATFORM    (utsname()->machine)
 135
 136#define ELF_PLAT_INIT(_r, load_addr) \
 137  do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \
 138       _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \
 139       _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
 140       _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
 141       _r->sr = SR_FD; } while (0)
 142
 143#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr,       \
 144                            _dynamic_addr)                              \
 145do {                                                                    \
 146        _r->regs[0]     = 0;                                            \
 147        _r->regs[1]     = 0;                                            \
 148        _r->regs[2]     = 0;                                            \
 149        _r->regs[3]     = 0;                                            \
 150        _r->regs[4]     = 0;                                            \
 151        _r->regs[5]     = 0;                                            \
 152        _r->regs[6]     = 0;                                            \
 153        _r->regs[7]     = 0;                                            \
 154        _r->regs[8]     = _exec_map_addr;                               \
 155        _r->regs[9]     = _interp_map_addr;                             \
 156        _r->regs[10]    = _dynamic_addr;                                \
 157        _r->regs[11]    = 0;                                            \
 158        _r->regs[12]    = 0;                                            \
 159        _r->regs[13]    = 0;                                            \
 160        _r->regs[14]    = 0;                                            \
 161        _r->sr          = SR_FD;                                        \
 162} while (0)
 163
 164#define SET_PERSONALITY(ex) \
 165        set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
 166
 167#ifdef CONFIG_VSYSCALL
 168/* vDSO has arch_setup_additional_pages */
 169#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
 170struct linux_binprm;
 171extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 172                                       int uses_interp);
 173
 174extern unsigned int vdso_enabled;
 175extern void __kernel_vsyscall;
 176
 177#define VDSO_BASE               ((unsigned long)current->mm->context.vdso)
 178#define VDSO_SYM(x)             (VDSO_BASE + (unsigned long)(x))
 179
 180#define VSYSCALL_AUX_ENT                                        \
 181        if (vdso_enabled)                                       \
 182                NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE);        \
 183        else                                                    \
 184                NEW_AUX_ENT(AT_IGNORE, 0)
 185#else
 186#define VSYSCALL_AUX_ENT        NEW_AUX_ENT(AT_IGNORE, 0)
 187#endif /* CONFIG_VSYSCALL */
 188
 189#ifdef CONFIG_SH_FPU
 190#define FPU_AUX_ENT     NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
 191#else
 192#define FPU_AUX_ENT     NEW_AUX_ENT(AT_IGNORE, 0)
 193#endif
 194
 195extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
 196
 197/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 198#define ARCH_DLINFO                                             \
 199do {                                                            \
 200        /* Optional FPU initialization */                       \
 201        FPU_AUX_ENT;                                            \
 202                                                                \
 203        /* Optional vsyscall entry */                           \
 204        VSYSCALL_AUX_ENT;                                       \
 205                                                                \
 206        /* Cache desc */                                        \
 207        NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape);        \
 208        NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape);        \
 209        NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape);          \
 210} while (0)
 211
 212#endif /* __KERNEL__ */
 213#endif /* __ASM_SH_ELF_H */
 214