arch/s390/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  S390 version
   4  *
   5  *  Derived from "include/asm-i386/elf.h"
   6  */
   7
   8 #ifndef __ASMS390_ELF_H
   9 #define __ASMS390_ELF_H
  10
  11 /* s390 relocations defined by the ABIs */
  12 #define R_390_NONE              0       /* No reloc.  */
  13 #define R_390_8                 1       /* Direct 8 bit.  */
  14 #define R_390_12                2       /* Direct 12 bit.  */
  15 #define R_390_16                3       /* Direct 16 bit.  */
  16 #define R_390_32                4       /* Direct 32 bit.  */
  17 #define R_390_PC32              5       /* PC relative 32 bit.  */
  18 #define R_390_GOT12             6       /* 12 bit GOT offset.  */
  19 #define R_390_GOT32             7       /* 32 bit GOT offset.  */
  20 #define R_390_PLT32             8       /* 32 bit PC relative PLT address.  */
  21 #define R_390_COPY              9       /* Copy symbol at runtime.  */
  22 #define R_390_GLOB_DAT          10      /* Create GOT entry.  */
  23 #define R_390_JMP_SLOT          11      /* Create PLT entry.  */
  24 #define R_390_RELATIVE          12      /* Adjust by program base.  */
  25 #define R_390_GOTOFF32          13      /* 32 bit offset to GOT.         */
  26 #define R_390_GOTPC             14      /* 32 bit PC rel. offset to GOT.  */
  27 #define R_390_GOT16             15      /* 16 bit GOT offset.  */
  28 #define R_390_PC16              16      /* PC relative 16 bit.  */
  29 #define R_390_PC16DBL           17      /* PC relative 16 bit shifted by 1.  */
  30 #define R_390_PLT16DBL          18      /* 16 bit PC rel. PLT shifted by 1.  */
  31 #define R_390_PC32DBL           19      /* PC relative 32 bit shifted by 1.  */
  32 #define R_390_PLT32DBL          20      /* 32 bit PC rel. PLT shifted by 1.  */
  33 #define R_390_GOTPCDBL          21      /* 32 bit PC rel. GOT shifted by 1.  */
  34 #define R_390_64                22      /* Direct 64 bit.  */
  35 #define R_390_PC64              23      /* PC relative 64 bit.  */
  36 #define R_390_GOT64             24      /* 64 bit GOT offset.  */
  37 #define R_390_PLT64             25      /* 64 bit PC relative PLT address.  */
  38 #define R_390_GOTENT            26      /* 32 bit PC rel. to GOT entry >> 1. */
  39 #define R_390_GOTOFF16          27      /* 16 bit offset to GOT. */
  40 #define R_390_GOTOFF64          28      /* 64 bit offset to GOT. */
  41 #define R_390_GOTPLT12          29      /* 12 bit offset to jump slot.  */
  42 #define R_390_GOTPLT16          30      /* 16 bit offset to jump slot.  */
  43 #define R_390_GOTPLT32          31      /* 32 bit offset to jump slot.  */
  44 #define R_390_GOTPLT64          32      /* 64 bit offset to jump slot.  */
  45 #define R_390_GOTPLTENT         33      /* 32 bit rel. offset to jump slot.  */
  46 #define R_390_PLTOFF16          34      /* 16 bit offset from GOT to PLT. */
  47 #define R_390_PLTOFF32          35      /* 32 bit offset from GOT to PLT. */
  48 #define R_390_PLTOFF64          36      /* 16 bit offset from GOT to PLT. */
  49 #define R_390_TLS_LOAD          37      /* Tag for load insn in TLS code. */
  50 #define R_390_TLS_GDCALL        38      /* Tag for function call in general
  51                                            dynamic TLS code.  */
  52 #define R_390_TLS_LDCALL        39      /* Tag for function call in local
  53                                            dynamic TLS code.  */
  54 #define R_390_TLS_GD32          40      /* Direct 32 bit for general dynamic
  55                                            thread local data.  */
  56 #define R_390_TLS_GD64          41      /* Direct 64 bit for general dynamic
  57                                            thread local data.  */
  58 #define R_390_TLS_GOTIE12       42      /* 12 bit GOT offset for static TLS
  59                                            block offset.  */
  60 #define R_390_TLS_GOTIE32       43      /* 32 bit GOT offset for static TLS
  61                                            block offset.  */
  62 #define R_390_TLS_GOTIE64       44      /* 64 bit GOT offset for static TLS
  63                                            block offset.  */
  64 #define R_390_TLS_LDM32         45      /* Direct 32 bit for local dynamic
  65                                            thread local data in LD code.  */
  66 #define R_390_TLS_LDM64         46      /* Direct 64 bit for local dynamic
  67                                            thread local data in LD code.  */
  68 #define R_390_TLS_IE32          47      /* 32 bit address of GOT entry for
  69                                            negated static TLS block offset.  */
  70 #define R_390_TLS_IE64          48      /* 64 bit address of GOT entry for
  71                                            negated static TLS block offset.  */
  72 #define R_390_TLS_IEENT         49      /* 32 bit rel. offset to GOT entry for
  73                                            negated static TLS block offset.  */
  74 #define R_390_TLS_LE32          50      /* 32 bit negated offset relative to
  75                                            static TLS block.  */
  76 #define R_390_TLS_LE64          51      /* 64 bit negated offset relative to
  77                                            static TLS block.  */
  78 #define R_390_TLS_LDO32         52      /* 32 bit offset relative to TLS
  79                                            block.  */
  80 #define R_390_TLS_LDO64         53      /* 64 bit offset relative to TLS
  81                                            block.  */
  82 #define R_390_TLS_DTPMOD        54      /* ID of module containing symbol.  */
  83 #define R_390_TLS_DTPOFF        55      /* Offset in TLS block.  */
  84 #define R_390_TLS_TPOFF         56      /* Negate offset in static TLS
  85                                            block.  */
  86 #define R_390_20                57      /* Direct 20 bit.  */
  87 #define R_390_GOT20             58      /* 20 bit GOT offset.  */
  88 #define R_390_GOTPLT20          59      /* 20 bit offset to jump slot.  */
  89 #define R_390_TLS_GOTIE20       60      /* 20 bit GOT offset for static TLS
  90                                            block offset.  */
  91 /* Keep this the last entry.  */
  92 #define R_390_NUM       61
  93
  94 /* Bits present in AT_HWCAP. */
  95 #define HWCAP_S390_ESAN3        1
  96 #define HWCAP_S390_ZARCH        2
  97 #define HWCAP_S390_STFLE        4
  98 #define HWCAP_S390_MSA          8
  99 #define HWCAP_S390_LDISP        16
 100 #define HWCAP_S390_EIMM         32
 101 #define HWCAP_S390_DFP          64
 102 #define HWCAP_S390_HPAGE        128
 103 #define HWCAP_S390_ETF3EH       256
 104 #define HWCAP_S390_HIGH_GPRS    512
 105 #define HWCAP_S390_TE           1024
 106 #define HWCAP_S390_VXRS         2048
 107 #define HWCAP_S390_VXRS_BCD     4096
 108 #define HWCAP_S390_VXRS_EXT     8192
 109 #define HWCAP_S390_GS           16384
 110
 111 /* Internal bits, not exposed via elf */
 112 #define HWCAP_INT_SIE           1UL
 113
 114 /*
 115  * These are used to set parameters in the core dumps.
 116  */
 117 #define ELF_CLASS       ELFCLASS64
 118 #define ELF_DATA        ELFDATA2MSB
 119 #define ELF_ARCH        EM_S390
 120
 121 /* s390 specific phdr types */
 122 #define PT_S390_PGSTE   0x70000000
 123
 124 /*
 125  * ELF register definitions..
 126  */
 127
 128 #include <asm/ptrace.h>
 129 #include <asm/compat.h>
 130 #include <asm/syscall.h>
 131 #include <asm/user.h>
 132
 133 typedef s390_fp_regs elf_fpregset_t;
 134 typedef s390_regs elf_gregset_t;
 135
 136 typedef s390_fp_regs compat_elf_fpregset_t;
 137 typedef s390_compat_regs compat_elf_gregset_t;
 138
 139 #include <linux/compat.h>
 140 #include <linux/sched/mm.h>     /* for task_struct */
 141 #include <asm/mmu_context.h>
 142
 143 #include <asm/vdso.h>
 144
 145 extern unsigned int vdso_enabled;
 146
 147 /*
 148  * This is used to ensure we don't load something for the wrong architecture.
 149  */
 150 #define elf_check_arch(x) \
 151         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 152          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 153 #define compat_elf_check_arch(x) \
 154         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 155          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 156 #define compat_start_thread     start_thread31
 157
 158 struct arch_elf_state {
 159         int rc;
 160 };
 161
 162 #define INIT_ARCH_ELF_STATE { .rc = 0 }
 163
 164 #define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
 165 #ifdef CONFIG_PGSTE
 166 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)        \
 167 ({                                                              \
 168         struct arch_elf_state *_state = state;                  \
 169         if ((phdr)->p_type == PT_S390_PGSTE &&                  \
 170             !page_table_allocate_pgste &&                       \
 171             !test_thread_flag(TIF_PGSTE) &&                     \
 172             !current->mm->context.alloc_pgste) {                \
 173                 set_thread_flag(TIF_PGSTE);                     \
 174                 set_pt_regs_flag(task_pt_regs(current),         \
 175                                  PIF_SYSCALL_RESTART);          \
 176                 _state->rc = -EAGAIN;                           \
 177         }                                                       \
 178         _state->rc;                                             \
 179 })
 180 #else
 181 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)        \
 182 ({                                                              \
 183         (state)->rc;                                            \
 184 })
 185 #endif
 186
 187 /* For SVR4/S390 the function pointer to be registered with `atexit` is
 188    passed in R14. */
 189 #define ELF_PLAT_INIT(_r, load_addr) \
 190         do { \
 191                 _r->gprs[14] = 0; \
 192         } while (0)
 193
 194 #define CORE_DUMP_USE_REGSET
 195 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 196
 197 /*
 198  * This is the base location for PIE (ET_DYN with INTERP) loads. On
 199  * 64-bit, this is raised to 4GB to leave the entire 32-bit address
 200  * space open for things that want to use the area for 32-bit pointers.
 201  */
 202 #define ELF_ET_DYN_BASE         (is_compat_task() ? 0x000400000UL : \
 203                                                     0x100000000UL)
 204
 205 /* This yields a mask that user programs can use to figure out what
 206    instruction set this CPU supports. */
 207
 208 extern unsigned long elf_hwcap;
 209 #define ELF_HWCAP (elf_hwcap)
 210
 211 /* Internal hardware capabilities, not exposed via elf */
 212
 213 extern unsigned long int_hwcap;
 214
 215 /* This yields a string that ld.so will use to load implementation
 216    specific libraries for optimization.  This is more specific in
 217    intent than poking at uname or /proc/cpuinfo.
 218
 219    For the moment, we have only optimizations for the Intel generations,
 220    but that could change... */
 221
 222 #define ELF_PLATFORM_SIZE 8
 223 extern char elf_platform[];
 224 #define ELF_PLATFORM (elf_platform)
 225
 226 #ifndef CONFIG_COMPAT
 227 #define SET_PERSONALITY(ex) \
 228 do {                                                            \
 229         set_personality(PER_LINUX |                             \
 230                 (current->personality & (~PER_MASK)));          \
 231         current->thread.sys_call_table =                        \
 232                 (unsigned long) &sys_call_table;                \
 233 } while (0)
 234 #else /* CONFIG_COMPAT */
 235 #define SET_PERSONALITY(ex)                                     \
 236 do {                                                            \
 237         if (personality(current->personality) != PER_LINUX32)   \
 238                 set_personality(PER_LINUX |                     \
 239                         (current->personality & ~PER_MASK));    \
 240         if ((ex).e_ident[EI_CLASS] == ELFCLASS32) {             \
 241                 set_thread_flag(TIF_31BIT);                     \
 242                 current->thread.sys_call_table =                \
 243                         (unsigned long) &sys_call_table_emu;    \
 244         } else {                                                \
 245                 clear_thread_flag(TIF_31BIT);                   \
 246                 current->thread.sys_call_table =                \
 247                         (unsigned long) &sys_call_table;        \
 248         }                                                       \
 249 } while (0)
 250 #endif /* CONFIG_COMPAT */
 251
 252 /*
 253  * Cache aliasing on the latest machines calls for a mapping granularity
 254  * of 512KB. For 64-bit processes use a 512KB alignment and a randomization
 255  * of up to 1GB. For 31-bit processes the virtual address space is limited,
 256  * use no alignment and limit the randomization to 8MB.
 257  */
 258 #define BRK_RND_MASK    (is_compat_task() ? 0x7ffUL : 0x3ffffUL)
 259 #define MMAP_RND_MASK   (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
 260 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
 261 #define STACK_RND_MASK  MMAP_RND_MASK
 262
 263 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 264 #define ARCH_DLINFO                                                         \
 265 do {                                                                        \
 266         if (vdso_enabled)                                                   \
 267                 NEW_AUX_ENT(AT_SYSINFO_EHDR,                                \
 268                             (unsigned long)current->mm->context.vdso_base); \
 269 } while (0)
 270
 271 struct linux_binprm;
 272
 273 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 274 int arch_setup_additional_pages(struct linux_binprm *, int);
 275
 276 #endif