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  * These are used to set parameters in the core dumps.
  97  */
  98 #ifndef __s390x__
  99 #define ELF_CLASS       ELFCLASS32
 100 #else /* __s390x__ */
 101 #define ELF_CLASS       ELFCLASS64
 102 #endif /* __s390x__ */
 103 #define ELF_DATA        ELFDATA2MSB
 104 #define ELF_ARCH        EM_S390
 105
 106 /*
 107  * ELF register definitions..
 108  */
 109
 110 #include <asm/ptrace.h>
 111 #include <asm/user.h>
 112
 113 typedef s390_fp_regs elf_fpregset_t;
 114 typedef s390_regs elf_gregset_t;
 115
 116 #include <linux/sched.h>        /* for task_struct */
 117 #include <asm/system.h>         /* for save_access_regs */
 118 #include <asm/mmu_context.h>
 119
 120 /*
 121  * This is used to ensure we don't load something for the wrong architecture.
 122  */
 123 #define elf_check_arch(x) \
 124         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 125          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 126
 127 /* For SVR4/S390 the function pointer to be registered with `atexit` is
 128    passed in R14. */
 129 #define ELF_PLAT_INIT(_r, load_addr) \
 130         do { \
 131                 _r->gprs[14] = 0; \
 132         } while (0)
 133
 134 #define USE_ELF_CORE_DUMP
 135 #define ELF_EXEC_PAGESIZE       4096
 136
 137 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 138    use of this is to invoke "./ld.so someprog" to test out a new version of
 139    the loader.  We need to make sure that it is out of the way of the program
 140    that it will "exec", and that there is sufficient room for the brk.  */
 141 #define ELF_ET_DYN_BASE         (STACK_TOP / 3 * 2)
 142
 143 /* Wow, the "main" arch needs arch dependent functions too.. :) */
 144
 145 /* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
 146    now struct_user_regs, they are different) */
 147
 148 static inline int dump_regs(struct pt_regs *ptregs, elf_gregset_t *regs)
 149 {
 150         memcpy(&regs->psw, &ptregs->psw, sizeof(regs->psw)+sizeof(regs->gprs));
 151         save_access_regs(regs->acrs);
 152         regs->orig_gpr2 = ptregs->orig_gpr2;
 153         return 1;
 154 }
 155
 156 #define ELF_CORE_COPY_REGS(pr_reg, regs) dump_regs(regs, &pr_reg);
 157
 158 static inline int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
 159 {
 160         struct pt_regs *ptregs = task_pt_regs(tsk);
 161         memcpy(&regs->psw, &ptregs->psw, sizeof(regs->psw)+sizeof(regs->gprs));
 162         memcpy(regs->acrs, tsk->thread.acrs, sizeof(regs->acrs));
 163         regs->orig_gpr2 = ptregs->orig_gpr2;
 164         return 1;
 165 }
 166
 167 #define ELF_CORE_COPY_TASK_REGS(tsk, regs) dump_task_regs(tsk, regs)
 168
 169 static inline int dump_task_fpu(struct task_struct *tsk, elf_fpregset_t *fpregs)
 170 {
 171         if (tsk == current)
 172                 save_fp_regs(fpregs);
 173         else
 174                 memcpy(fpregs, &tsk->thread.fp_regs, sizeof(elf_fpregset_t));
 175         return 1;
 176 }
 177
 178 #define ELF_CORE_COPY_FPREGS(tsk, fpregs) dump_task_fpu(tsk, fpregs)
 179
 180
 181 /* This yields a mask that user programs can use to figure out what
 182    instruction set this CPU supports. */
 183
 184 extern unsigned long elf_hwcap;
 185 #define ELF_HWCAP (elf_hwcap)
 186
 187 /* This yields a string that ld.so will use to load implementation
 188    specific libraries for optimization.  This is more specific in
 189    intent than poking at uname or /proc/cpuinfo.
 190
 191    For the moment, we have only optimizations for the Intel generations,
 192    but that could change... */
 193
 194 #define ELF_PLATFORM_SIZE 8
 195 extern char elf_platform[];
 196 #define ELF_PLATFORM (elf_platform)
 197
 198 #ifndef __s390x__
 199 #define SET_PERSONALITY(ex, ibcs2) set_personality((ibcs2)?PER_SVR4:PER_LINUX)
 200 #else /* __s390x__ */
 201 #define SET_PERSONALITY(ex, ibcs2)                      \
 202 do {                                                    \
 203         if (ibcs2)                                      \
 204                 set_personality(PER_SVR4);              \
 205         else if (current->personality != PER_LINUX32)   \
 206                 set_personality(PER_LINUX);             \
 207         clear_thread_flag(TIF_31BIT);                   \
 208 } while (0)
 209 #endif /* __s390x__ */
 210
 211 /*
 212  * An executable for which elf_read_implies_exec() returns TRUE will
 213  * have the READ_IMPLIES_EXEC personality flag set automatically.
 214  */
 215 #define elf_read_implies_exec(ex, executable_stack)     \
 216 ({                                                      \
 217         if (current->mm->context.noexec &&              \
 218             executable_stack != EXSTACK_DISABLE_X)      \
 219                 disable_noexec(current->mm, current);   \
 220         current->mm->context.noexec == 0;               \
 221 })
 222
 223 #endif