arch/s390/include/asm/elf.h

   1 /*
   2  *  S390 version
   3  *
   4  *  Derived from "include/asm-i386/elf.h"
   5  */
   6
   7 #ifndef __ASMS390_ELF_H
   8 #define __ASMS390_ELF_H
   9
  10 /* s390 relocations defined by the ABIs */
  11 #define R_390_NONE              0       /* No reloc.  */
  12 #define R_390_8                 1       /* Direct 8 bit.  */
  13 #define R_390_12                2       /* Direct 12 bit.  */
  14 #define R_390_16                3       /* Direct 16 bit.  */
  15 #define R_390_32                4       /* Direct 32 bit.  */
  16 #define R_390_PC32              5       /* PC relative 32 bit.  */
  17 #define R_390_GOT12             6       /* 12 bit GOT offset.  */
  18 #define R_390_GOT32             7       /* 32 bit GOT offset.  */
  19 #define R_390_PLT32             8       /* 32 bit PC relative PLT address.  */
  20 #define R_390_COPY              9       /* Copy symbol at runtime.  */
  21 #define R_390_GLOB_DAT          10      /* Create GOT entry.  */
  22 #define R_390_JMP_SLOT          11      /* Create PLT entry.  */
  23 #define R_390_RELATIVE          12      /* Adjust by program base.  */
  24 #define R_390_GOTOFF32          13      /* 32 bit offset to GOT.         */
  25 #define R_390_GOTPC             14      /* 32 bit PC rel. offset to GOT.  */
  26 #define R_390_GOT16             15      /* 16 bit GOT offset.  */
  27 #define R_390_PC16              16      /* PC relative 16 bit.  */
  28 #define R_390_PC16DBL           17      /* PC relative 16 bit shifted by 1.  */
  29 #define R_390_PLT16DBL          18      /* 16 bit PC rel. PLT shifted by 1.  */
  30 #define R_390_PC32DBL           19      /* PC relative 32 bit shifted by 1.  */
  31 #define R_390_PLT32DBL          20      /* 32 bit PC rel. PLT shifted by 1.  */
  32 #define R_390_GOTPCDBL          21      /* 32 bit PC rel. GOT shifted by 1.  */
  33 #define R_390_64                22      /* Direct 64 bit.  */
  34 #define R_390_PC64              23      /* PC relative 64 bit.  */
  35 #define R_390_GOT64             24      /* 64 bit GOT offset.  */
  36 #define R_390_PLT64             25      /* 64 bit PC relative PLT address.  */
  37 #define R_390_GOTENT            26      /* 32 bit PC rel. to GOT entry >> 1. */
  38 #define R_390_GOTOFF16          27      /* 16 bit offset to GOT. */
  39 #define R_390_GOTOFF64          28      /* 64 bit offset to GOT. */
  40 #define R_390_GOTPLT12          29      /* 12 bit offset to jump slot.  */
  41 #define R_390_GOTPLT16          30      /* 16 bit offset to jump slot.  */
  42 #define R_390_GOTPLT32          31      /* 32 bit offset to jump slot.  */
  43 #define R_390_GOTPLT64          32      /* 64 bit offset to jump slot.  */
  44 #define R_390_GOTPLTENT         33      /* 32 bit rel. offset to jump slot.  */
  45 #define R_390_PLTOFF16          34      /* 16 bit offset from GOT to PLT. */
  46 #define R_390_PLTOFF32          35      /* 32 bit offset from GOT to PLT. */
  47 #define R_390_PLTOFF64          36      /* 16 bit offset from GOT to PLT. */
  48 #define R_390_TLS_LOAD          37      /* Tag for load insn in TLS code. */
  49 #define R_390_TLS_GDCALL        38      /* Tag for function call in general
  50                                            dynamic TLS code.  */
  51 #define R_390_TLS_LDCALL        39      /* Tag for function call in local
  52                                            dynamic TLS code.  */
  53 #define R_390_TLS_GD32          40      /* Direct 32 bit for general dynamic
  54                                            thread local data.  */
  55 #define R_390_TLS_GD64          41      /* Direct 64 bit for general dynamic
  56                                            thread local data.  */
  57 #define R_390_TLS_GOTIE12       42      /* 12 bit GOT offset for static TLS
  58                                            block offset.  */
  59 #define R_390_TLS_GOTIE32       43      /* 32 bit GOT offset for static TLS
  60                                            block offset.  */
  61 #define R_390_TLS_GOTIE64       44      /* 64 bit GOT offset for static TLS
  62                                            block offset.  */
  63 #define R_390_TLS_LDM32         45      /* Direct 32 bit for local dynamic
  64                                            thread local data in LD code.  */
  65 #define R_390_TLS_LDM64         46      /* Direct 64 bit for local dynamic
  66                                            thread local data in LD code.  */
  67 #define R_390_TLS_IE32          47      /* 32 bit address of GOT entry for
  68                                            negated static TLS block offset.  */
  69 #define R_390_TLS_IE64          48      /* 64 bit address of GOT entry for
  70                                            negated static TLS block offset.  */
  71 #define R_390_TLS_IEENT         49      /* 32 bit rel. offset to GOT entry for
  72                                            negated static TLS block offset.  */
  73 #define R_390_TLS_LE32          50      /* 32 bit negated offset relative to
  74                                            static TLS block.  */
  75 #define R_390_TLS_LE64          51      /* 64 bit negated offset relative to
  76                                            static TLS block.  */
  77 #define R_390_TLS_LDO32         52      /* 32 bit offset relative to TLS
  78                                            block.  */
  79 #define R_390_TLS_LDO64         53      /* 64 bit offset relative to TLS
  80                                            block.  */
  81 #define R_390_TLS_DTPMOD        54      /* ID of module containing symbol.  */
  82 #define R_390_TLS_DTPOFF        55      /* Offset in TLS block.  */
  83 #define R_390_TLS_TPOFF         56      /* Negate offset in static TLS
  84                                            block.  */
  85 #define R_390_20                57      /* Direct 20 bit.  */
  86 #define R_390_GOT20             58      /* 20 bit GOT offset.  */
  87 #define R_390_GOTPLT20          59      /* 20 bit offset to jump slot.  */
  88 #define R_390_TLS_GOTIE20       60      /* 20 bit GOT offset for static TLS
  89                                            block offset.  */
  90 /* Keep this the last entry.  */
  91 #define R_390_NUM       61
  92
  93 /* Bits present in AT_HWCAP. */
  94 #define HWCAP_S390_ESAN3        1
  95 #define HWCAP_S390_ZARCH        2
  96 #define HWCAP_S390_STFLE        4
  97 #define HWCAP_S390_MSA          8
  98 #define HWCAP_S390_LDISP        16
  99 #define HWCAP_S390_EIMM         32
 100 #define HWCAP_S390_DFP          64
 101 #define HWCAP_S390_HPAGE        128
 102 #define HWCAP_S390_ETF3EH       256
 103 #define HWCAP_S390_HIGH_GPRS    512
 104 #define HWCAP_S390_TE           1024
 105 #define HWCAP_S390_VXRS         2048
 106
 107 /* Internal bits, not exposed via elf */
 108 #define HWCAP_INT_SIE           1UL
 109
 110 /*
 111  * These are used to set parameters in the core dumps.
 112  */
 113 #define ELF_CLASS       ELFCLASS64
 114 #define ELF_DATA        ELFDATA2MSB
 115 #define ELF_ARCH        EM_S390
 116
 117 /*
 118  * ELF register definitions..
 119  */
 120
 121 #include <asm/ptrace.h>
 122 #include <asm/compat.h>
 123 #include <asm/syscall.h>
 124 #include <asm/user.h>
 125
 126 typedef s390_fp_regs elf_fpregset_t;
 127 typedef s390_regs elf_gregset_t;
 128
 129 typedef s390_fp_regs compat_elf_fpregset_t;
 130 typedef s390_compat_regs compat_elf_gregset_t;
 131
 132 #include <linux/compat.h>
 133 #include <linux/sched.h>        /* for task_struct */
 134 #include <asm/mmu_context.h>
 135
 136 #include <asm/vdso.h>
 137
 138 extern unsigned int vdso_enabled;
 139
 140 /*
 141  * This is used to ensure we don't load something for the wrong architecture.
 142  */
 143 #define elf_check_arch(x) \
 144         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 145          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 146 #define compat_elf_check_arch(x) \
 147         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 148          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 149 #define compat_start_thread     start_thread31
 150
 151 /* For SVR4/S390 the function pointer to be registered with `atexit` is
 152    passed in R14. */
 153 #define ELF_PLAT_INIT(_r, load_addr) \
 154         do { \
 155                 _r->gprs[14] = 0; \
 156         } while (0)
 157
 158 #define CORE_DUMP_USE_REGSET
 159 #define ELF_EXEC_PAGESIZE       4096
 160
 161 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 162    use of this is to invoke "./ld.so someprog" to test out a new version of
 163    the loader.  We need to make sure that it is out of the way of the program
 164    that it will "exec", and that there is sufficient room for the brk. 64-bit
 165    tasks are aligned to 4GB. */
 166 #define ELF_ET_DYN_BASE (is_compat_task() ? \
 167                                 (STACK_TOP / 3 * 2) : \
 168                                 (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
 169
 170 /* This yields a mask that user programs can use to figure out what
 171    instruction set this CPU supports. */
 172
 173 extern unsigned long elf_hwcap;
 174 #define ELF_HWCAP (elf_hwcap)
 175
 176 /* Internal hardware capabilities, not exposed via elf */
 177
 178 extern unsigned long int_hwcap;
 179
 180 /* This yields a string that ld.so will use to load implementation
 181    specific libraries for optimization.  This is more specific in
 182    intent than poking at uname or /proc/cpuinfo.
 183
 184    For the moment, we have only optimizations for the Intel generations,
 185    but that could change... */
 186
 187 #define ELF_PLATFORM_SIZE 8
 188 extern char elf_platform[];
 189 #define ELF_PLATFORM (elf_platform)
 190
 191 #ifndef CONFIG_COMPAT
 192 #define SET_PERSONALITY(ex) \
 193 do {                                                            \
 194         set_personality(PER_LINUX |                             \
 195                 (current->personality & (~PER_MASK)));          \
 196         current->thread.sys_call_table =                        \
 197                 (unsigned long) &sys_call_table;                \
 198 } while (0)
 199 #else /* CONFIG_COMPAT */
 200 #define SET_PERSONALITY(ex)                                     \
 201 do {                                                            \
 202         if (personality(current->personality) != PER_LINUX32)   \
 203                 set_personality(PER_LINUX |                     \
 204                         (current->personality & ~PER_MASK));    \
 205         if ((ex).e_ident[EI_CLASS] == ELFCLASS32) {             \
 206                 set_thread_flag(TIF_31BIT);                     \
 207                 current->thread.sys_call_table =                \
 208                         (unsigned long) &sys_call_table_emu;    \
 209         } else {                                                \
 210                 clear_thread_flag(TIF_31BIT);                   \
 211                 current->thread.sys_call_table =                \
 212                         (unsigned long) &sys_call_table;        \
 213         }                                                       \
 214 } while (0)
 215 #endif /* CONFIG_COMPAT */
 216
 217 /*
 218  * Cache aliasing on the latest machines calls for a mapping granularity
 219  * of 512KB. For 64-bit processes use a 512KB alignment and a randomization
 220  * of up to 1GB. For 31-bit processes the virtual address space is limited,
 221  * use no alignment and limit the randomization to 8MB.
 222  */
 223 #define BRK_RND_MASK    (is_compat_task() ? 0x7ffUL : 0x3ffffUL)
 224 #define MMAP_RND_MASK   (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
 225 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
 226 #define STACK_RND_MASK  MMAP_RND_MASK
 227
 228 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 229 #define ARCH_DLINFO                                                         \
 230 do {                                                                        \
 231         if (vdso_enabled)                                                   \
 232                 NEW_AUX_ENT(AT_SYSINFO_EHDR,                                \
 233                             (unsigned long)current->mm->context.vdso_base); \
 234 } while (0)
 235
 236 struct linux_binprm;
 237
 238 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 239 int arch_setup_additional_pages(struct linux_binprm *, int);
 240
 241 #endif