include/asm-s390/elf.h

   1 /*
   2  *  include/asm-s390/elf.h
   3  *
   4  *  S390 version
   5  *
   6  *  Derived from "include/asm-i386/elf.h"
   7  */
   8
   9 #ifndef __ASMS390_ELF_H
  10 #define __ASMS390_ELF_H
  11
  12 /* s390 relocations defined by the ABIs */
  13 #define R_390_NONE              0       /* No reloc.  */
  14 #define R_390_8                 1       /* Direct 8 bit.  */
  15 #define R_390_12                2       /* Direct 12 bit.  */
  16 #define R_390_16                3       /* Direct 16 bit.  */
  17 #define R_390_32                4       /* Direct 32 bit.  */
  18 #define R_390_PC32              5       /* PC relative 32 bit.  */
  19 #define R_390_GOT12             6       /* 12 bit GOT offset.  */
  20 #define R_390_GOT32             7       /* 32 bit GOT offset.  */
  21 #define R_390_PLT32             8       /* 32 bit PC relative PLT address.  */
  22 #define R_390_COPY              9       /* Copy symbol at runtime.  */
  23 #define R_390_GLOB_DAT          10      /* Create GOT entry.  */
  24 #define R_390_JMP_SLOT          11      /* Create PLT entry.  */
  25 #define R_390_RELATIVE          12      /* Adjust by program base.  */
  26 #define R_390_GOTOFF32          13      /* 32 bit offset to GOT.         */
  27 #define R_390_GOTPC             14      /* 32 bit PC rel. offset to GOT.  */
  28 #define R_390_GOT16             15      /* 16 bit GOT offset.  */
  29 #define R_390_PC16              16      /* PC relative 16 bit.  */
  30 #define R_390_PC16DBL           17      /* PC relative 16 bit shifted by 1.  */
  31 #define R_390_PLT16DBL          18      /* 16 bit PC rel. PLT shifted by 1.  */
  32 #define R_390_PC32DBL           19      /* PC relative 32 bit shifted by 1.  */
  33 #define R_390_PLT32DBL          20      /* 32 bit PC rel. PLT shifted by 1.  */
  34 #define R_390_GOTPCDBL          21      /* 32 bit PC rel. GOT shifted by 1.  */
  35 #define R_390_64                22      /* Direct 64 bit.  */
  36 #define R_390_PC64              23      /* PC relative 64 bit.  */
  37 #define R_390_GOT64             24      /* 64 bit GOT offset.  */
  38 #define R_390_PLT64             25      /* 64 bit PC relative PLT address.  */
  39 #define R_390_GOTENT            26      /* 32 bit PC rel. to GOT entry >> 1. */
  40 #define R_390_GOTOFF16          27      /* 16 bit offset to GOT. */
  41 #define R_390_GOTOFF64          28      /* 64 bit offset to GOT. */
  42 #define R_390_GOTPLT12          29      /* 12 bit offset to jump slot.  */
  43 #define R_390_GOTPLT16          30      /* 16 bit offset to jump slot.  */
  44 #define R_390_GOTPLT32          31      /* 32 bit offset to jump slot.  */
  45 #define R_390_GOTPLT64          32      /* 64 bit offset to jump slot.  */
  46 #define R_390_GOTPLTENT         33      /* 32 bit rel. offset to jump slot.  */
  47 #define R_390_PLTOFF16          34      /* 16 bit offset from GOT to PLT. */
  48 #define R_390_PLTOFF32          35      /* 32 bit offset from GOT to PLT. */
  49 #define R_390_PLTOFF64          36      /* 16 bit offset from GOT to PLT. */
  50 #define R_390_TLS_LOAD          37      /* Tag for load insn in TLS code. */
  51 #define R_390_TLS_GDCALL        38      /* Tag for function call in general
  52                                            dynamic TLS code.  */
  53 #define R_390_TLS_LDCALL        39      /* Tag for function call in local
  54                                            dynamic TLS code.  */
  55 #define R_390_TLS_GD32          40      /* Direct 32 bit for general dynamic
  56                                            thread local data.  */
  57 #define R_390_TLS_GD64          41      /* Direct 64 bit for general dynamic
  58                                            thread local data.  */
  59 #define R_390_TLS_GOTIE12       42      /* 12 bit GOT offset for static TLS
  60                                            block offset.  */
  61 #define R_390_TLS_GOTIE32       43      /* 32 bit GOT offset for static TLS
  62                                            block offset.  */
  63 #define R_390_TLS_GOTIE64       44      /* 64 bit GOT offset for static TLS
  64                                            block offset.  */
  65 #define R_390_TLS_LDM32         45      /* Direct 32 bit for local dynamic
  66                                            thread local data in LD code.  */
  67 #define R_390_TLS_LDM64         46      /* Direct 64 bit for local dynamic
  68                                            thread local data in LD code.  */
  69 #define R_390_TLS_IE32          47      /* 32 bit address of GOT entry for
  70                                            negated static TLS block offset.  */
  71 #define R_390_TLS_IE64          48      /* 64 bit address of GOT entry for
  72                                            negated static TLS block offset.  */
  73 #define R_390_TLS_IEENT         49      /* 32 bit rel. offset to GOT entry for
  74                                            negated static TLS block offset.  */
  75 #define R_390_TLS_LE32          50      /* 32 bit negated offset relative to
  76                                            static TLS block.  */
  77 #define R_390_TLS_LE64          51      /* 64 bit negated offset relative to
  78                                            static TLS block.  */
  79 #define R_390_TLS_LDO32         52      /* 32 bit offset relative to TLS
  80                                            block.  */
  81 #define R_390_TLS_LDO64         53      /* 64 bit offset relative to TLS
  82                                            block.  */
  83 #define R_390_TLS_DTPMOD        54      /* ID of module containing symbol.  */
  84 #define R_390_TLS_DTPOFF        55      /* Offset in TLS block.  */
  85 #define R_390_TLS_TPOFF         56      /* Negate offset in static TLS
  86                                            block.  */
  87 #define R_390_20                57      /* Direct 20 bit.  */
  88 #define R_390_GOT20             58      /* 20 bit GOT offset.  */
  89 #define R_390_GOTPLT20          59      /* 20 bit offset to jump slot.  */
  90 #define R_390_TLS_GOTIE20       60      /* 20 bit GOT offset for static TLS
  91                                            block offset.  */
  92 /* Keep this the last entry.  */
  93 #define R_390_NUM       61
  94
  95 /*
  96  * ELF register definitions..
  97  */
  98
  99 #include <asm/ptrace.h>
 100 #include <asm/user.h>
 101 #include <asm/system.h>         /* for save_access_regs */
 102
 103
 104 typedef s390_fp_regs elf_fpregset_t;
 105 typedef s390_regs elf_gregset_t;
 106
 107 /*
 108  * These are used to set parameters in the core dumps.
 109  */
 110 #ifndef __s390x__
 111 #define ELF_CLASS       ELFCLASS32
 112 #else /* __s390x__ */
 113 #define ELF_CLASS       ELFCLASS64
 114 #endif /* __s390x__ */
 115 #define ELF_DATA        ELFDATA2MSB
 116 #define ELF_ARCH        EM_S390
 117
 118 /*
 119  * This is used to ensure we don't load something for the wrong architecture.
 120  */
 121 #define elf_check_arch(x) \
 122         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 123          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 124
 125 /* For SVR4/S390 the function pointer to be registered with `atexit` is
 126    passed in R14. */
 127 #define ELF_PLAT_INIT(_r, load_addr) \
 128         do { \
 129                 _r->gprs[14] = 0; \
 130         } while (0)
 131
 132 #define USE_ELF_CORE_DUMP
 133 #define ELF_EXEC_PAGESIZE       4096
 134
 135 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 136    use of this is to invoke "./ld.so someprog" to test out a new version of
 137    the loader.  We need to make sure that it is out of the way of the program
 138    that it will "exec", and that there is sufficient room for the brk.  */
 139
 140 #ifndef __s390x__
 141 #define ELF_ET_DYN_BASE         ((TASK_SIZE & 0x80000000) \
 142                                 ? TASK_SIZE / 3 * 2 \
 143                                 : 2 * TASK_SIZE / 3)
 144 #else /* __s390x__ */
 145 #define ELF_ET_DYN_BASE         (TASK_SIZE / 3 * 2)
 146 #endif /* __s390x__ */
 147
 148 /* Wow, the "main" arch needs arch dependent functions too.. :) */
 149
 150 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
 151    now struct_user_regs, they are different) */
 152
 153 static inline int dump_regs(struct pt_regs *ptregs, elf_gregset_t *regs)
 154 {
 155         memcpy(&regs->psw, &ptregs->psw, sizeof(regs->psw)+sizeof(regs->gprs));
 156         save_access_regs(regs->acrs);
 157         regs->orig_gpr2 = ptregs->orig_gpr2;
 158         return 1;
 159 }
 160
 161 #define ELF_CORE_COPY_REGS(pr_reg, regs) dump_regs(regs, &pr_reg);
 162
 163 static inline int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
 164 {
 165         struct pt_regs *ptregs = __KSTK_PTREGS(tsk);
 166         memcpy(&regs->psw, &ptregs->psw, sizeof(regs->psw)+sizeof(regs->gprs));
 167         memcpy(regs->acrs, tsk->thread.acrs, sizeof(regs->acrs));
 168         regs->orig_gpr2 = ptregs->orig_gpr2;
 169         return 1;
 170 }
 171
 172 #define ELF_CORE_COPY_TASK_REGS(tsk, regs) dump_task_regs(tsk, regs)
 173
 174 static inline int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs)
 175 {
 176         if (tsk == current)
 177                 save_fp_regs(fpregs);
 178         else
 179                 memcpy(fpregs, &tsk->thread.fp_regs, sizeof(elf_fpregset_t));
 180         return 1;
 181 }
 182
 183 #define ELF_CORE_COPY_FPREGS(tsk, fpregs) dump_task_fpu(tsk, fpregs)
 184
 185
 186 /* This yields a mask that user programs can use to figure out what
 187    instruction set this CPU supports. */
 188
 189 #define ELF_HWCAP (0)
 190
 191 /* This yields a string that ld.so will use to load implementation
 192    specific libraries for optimization.  This is more specific in
 193    intent than poking at uname or /proc/cpuinfo.
 194
 195    For the moment, we have only optimizations for the Intel generations,
 196    but that could change... */
 197
 198 #define ELF_PLATFORM (NULL)
 199
 200 #ifdef __KERNEL__
 201 #ifndef __s390x__
 202 #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
 203 #else /* __s390x__ */
 204 #define SET_PERSONALITY(ex, ibcs2)                      \
 205 do {                                                    \
 206         if (ibcs2)                                      \
 207                 set_personality(PER_SVR4);              \
 208         else if (current->personality != PER_LINUX32)   \
 209                 set_personality(PER_LINUX);             \
 210         clear_thread_flag(TIF_31BIT);                   \
 211 } while (0)
 212 #endif /* __s390x__ */
 213 #endif
 214
 215 #endif