LXR linux/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
 133typedef s390_fp_regs elf_fpregset_t;
 134typedef s390_regs elf_gregset_t;
 135
 136typedef s390_fp_regs compat_elf_fpregset_t;
 137typedef 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
 145extern 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
 158struct 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
 208extern unsigned long elf_hwcap;
 209#define ELF_HWCAP (elf_hwcap)
 210
 211/* Internal hardware capabilities, not exposed via elf */
 212
 213extern 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
 223extern char elf_platform[];
 224#define ELF_PLATFORM (elf_platform)
 225
 226#ifndef CONFIG_COMPAT
 227#define SET_PERSONALITY(ex) \
 228do {                                                            \
 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)                                     \
 236do {                                                            \
 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                                                         \
 265do {                                                                        \
 266        if (vdso_enabled)                                                   \
 267                NEW_AUX_ENT(AT_SYSINFO_EHDR,                                \
 268                            (unsigned long)current->mm->context.vdso_base); \
 269} while (0)
 270
 271struct linux_binprm;
 272
 273#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
 274int arch_setup_additional_pages(struct linux_binprm *, int);
 275
 276#endif
 277