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 #define HWCAP_S390_VXRS_EXT2    32768
 111 #define HWCAP_S390_VXRS_PDE     65536
 112 #define HWCAP_S390_SORT         131072
 113 #define HWCAP_S390_DFLT         262144
 114
 115 /* Internal bits, not exposed via elf */
 116 #define HWCAP_INT_SIE           1UL
 117
 118 /*
 119  * These are used to set parameters in the core dumps.
 120  */
 121 #define ELF_CLASS       ELFCLASS64
 122 #define ELF_DATA        ELFDATA2MSB
 123 #define ELF_ARCH        EM_S390
 124
 125 /* s390 specific phdr types */
 126 #define PT_S390_PGSTE   0x70000000
 127
 128 /*
 129  * ELF register definitions..
 130  */
 131
 132 #include <linux/compat.h>
 133
 134 #include <asm/ptrace.h>
 135 #include <asm/syscall.h>
 136 #include <asm/user.h>
 137
 138 typedef s390_fp_regs elf_fpregset_t;
 139 typedef s390_regs elf_gregset_t;
 140
 141 typedef s390_fp_regs compat_elf_fpregset_t;
 142 typedef s390_compat_regs compat_elf_gregset_t;
 143
 144 #include <linux/sched/mm.h>     /* for task_struct */
 145 #include <asm/mmu_context.h>
 146
 147 #include <asm/vdso.h>
 148
 149 extern unsigned int vdso_enabled;
 150
 151 /*
 152  * This is used to ensure we don't load something for the wrong architecture.
 153  */
 154 #define elf_check_arch(x) \
 155         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 156          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 157 #define compat_elf_check_arch(x) \
 158         (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
 159          && (x)->e_ident[EI_CLASS] == ELF_CLASS)
 160 #define compat_start_thread     start_thread31
 161
 162 struct arch_elf_state {
 163         int rc;
 164 };
 165
 166 #define INIT_ARCH_ELF_STATE { .rc = 0 }
 167
 168 #define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
 169 #ifdef CONFIG_PGSTE
 170 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)        \
 171 ({                                                              \
 172         struct arch_elf_state *_state = state;                  \
 173         if ((phdr)->p_type == PT_S390_PGSTE &&                  \
 174             !page_table_allocate_pgste &&                       \
 175             !test_thread_flag(TIF_PGSTE) &&                     \
 176             !current->mm->context.alloc_pgste) {                \
 177                 set_thread_flag(TIF_PGSTE);                     \
 178                 set_pt_regs_flag(task_pt_regs(current),         \
 179                                  PIF_SYSCALL_RESTART);          \
 180                 _state->rc = -EAGAIN;                           \
 181         }                                                       \
 182         _state->rc;                                             \
 183 })
 184 #else
 185 #define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)        \
 186 ({                                                              \
 187         (state)->rc;                                            \
 188 })
 189 #endif
 190
 191 /* For SVR4/S390 the function pointer to be registered with `atexit` is
 192    passed in R14. */
 193 #define ELF_PLAT_INIT(_r, load_addr) \
 194         do { \
 195                 _r->gprs[14] = 0; \
 196         } while (0)
 197
 198 #define CORE_DUMP_USE_REGSET
 199 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
 200
 201 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
 202    use of this is to invoke "./ld.so someprog" to test out a new version of
 203    the loader.  We need to make sure that it is out of the way of the program
 204    that it will "exec", and that there is sufficient room for the brk. 64-bit
 205    tasks are aligned to 4GB. */
 206 #define ELF_ET_DYN_BASE (is_compat_task() ? \
 207                                 (STACK_TOP / 3 * 2) : \
 208                                 (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
 209
 210 /* This yields a mask that user programs can use to figure out what
 211    instruction set this CPU supports. */
 212
 213 extern unsigned long elf_hwcap;
 214 #define ELF_HWCAP (elf_hwcap)
 215
 216 /* Internal hardware capabilities, not exposed via elf */
 217
 218 extern unsigned long int_hwcap;
 219
 220 /* This yields a string that ld.so will use to load implementation
 221    specific libraries for optimization.  This is more specific in
 222    intent than poking at uname or /proc/cpuinfo.
 223
 224    For the moment, we have only optimizations for the Intel generations,
 225    but that could change... */
 226
 227 #define ELF_PLATFORM_SIZE 8
 228 extern char elf_platform[];
 229 #define ELF_PLATFORM (elf_platform)
 230
 231 #ifndef CONFIG_COMPAT
 232 #define SET_PERSONALITY(ex) \
 233 do {                                                            \
 234         set_personality(PER_LINUX |                             \
 235                 (current->personality & (~PER_MASK)));          \
 236         current->thread.sys_call_table =                        \
 237                 (unsigned long) &sys_call_table;                \
 238 } while (0)
 239 #else /* CONFIG_COMPAT */
 240 #define SET_PERSONALITY(ex)                                     \
 241 do {                                                            \
 242         if (personality(current->personality) != PER_LINUX32)   \
 243                 set_personality(PER_LINUX |                     \
 244                         (current->personality & ~PER_MASK));    \
 245         if ((ex).e_ident[EI_CLASS] == ELFCLASS32) {             \
 246                 set_thread_flag(TIF_31BIT);                     \
 247                 current->thread.sys_call_table =                \
 248                         (unsigned long) &sys_call_table_emu;    \
 249         } else {                                                \
 250                 clear_thread_flag(TIF_31BIT);                   \
 251                 current->thread.sys_call_table =                \
 252                         (unsigned long) &sys_call_table;        \
 253         }                                                       \
 254 } while (0)
 255 #endif /* CONFIG_COMPAT */
 256
 257 /*
 258  * Cache aliasing on the latest machines calls for a mapping granularity
 259  * of 512KB for the anonymous mapping base. For 64-bit processes use a
 260  * 512KB alignment and a randomization of up to 1GB. For 31-bit processes
 261  * the virtual address space is limited, use no alignment and limit the
 262  * randomization to 8MB.
 263  * For the additional randomization of the program break use 32MB for
 264  * 64-bit and 8MB for 31-bit.
 265  */
 266 #define BRK_RND_MASK    (is_compat_task() ? 0x7ffUL : 0x1fffUL)
 267 #define MMAP_RND_MASK   (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
 268 #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
 269 #define STACK_RND_MASK  MMAP_RND_MASK
 270
 271 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 272 #define ARCH_DLINFO                                                         \
 273 do {                                                                        \
 274         if (vdso_enabled)                                                   \
 275                 NEW_AUX_ENT(AT_SYSINFO_EHDR,                                \
 276                             (unsigned long)current->mm->context.vdso_base); \
 277 } while (0)
 278
 279 struct linux_binprm;
 280
 281 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 282 int arch_setup_additional_pages(struct linux_binprm *, int);
 283
 284 #endif