arch/alpha/include/asm/elf.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_ALPHA_ELF_H
   3 #define __ASM_ALPHA_ELF_H
   4
   5 #include <asm/auxvec.h>
   6 #include <asm/special_insns.h>
   7
   8 /* Special values for the st_other field in the symbol table.  */
   9
  10 #define STO_ALPHA_NOPV          0x80
  11 #define STO_ALPHA_STD_GPLOAD    0x88
  12
  13 /*
  14  * Alpha ELF relocation types
  15  */
  16 #define R_ALPHA_NONE            0       /* No reloc */
  17 #define R_ALPHA_REFLONG         1       /* Direct 32 bit */
  18 #define R_ALPHA_REFQUAD         2       /* Direct 64 bit */
  19 #define R_ALPHA_GPREL32         3       /* GP relative 32 bit */
  20 #define R_ALPHA_LITERAL         4       /* GP relative 16 bit w/optimization */
  21 #define R_ALPHA_LITUSE          5       /* Optimization hint for LITERAL */
  22 #define R_ALPHA_GPDISP          6       /* Add displacement to GP */
  23 #define R_ALPHA_BRADDR          7       /* PC+4 relative 23 bit shifted */
  24 #define R_ALPHA_HINT            8       /* PC+4 relative 16 bit shifted */
  25 #define R_ALPHA_SREL16          9       /* PC relative 16 bit */
  26 #define R_ALPHA_SREL32          10      /* PC relative 32 bit */
  27 #define R_ALPHA_SREL64          11      /* PC relative 64 bit */
  28 #define R_ALPHA_GPRELHIGH       17      /* GP relative 32 bit, high 16 bits */
  29 #define R_ALPHA_GPRELLOW        18      /* GP relative 32 bit, low 16 bits */
  30 #define R_ALPHA_GPREL16         19      /* GP relative 16 bit */
  31 #define R_ALPHA_COPY            24      /* Copy symbol at runtime */
  32 #define R_ALPHA_GLOB_DAT        25      /* Create GOT entry */
  33 #define R_ALPHA_JMP_SLOT        26      /* Create PLT entry */
  34 #define R_ALPHA_RELATIVE        27      /* Adjust by program base */
  35 #define R_ALPHA_BRSGP           28
  36 #define R_ALPHA_TLSGD           29
  37 #define R_ALPHA_TLS_LDM         30
  38 #define R_ALPHA_DTPMOD64        31
  39 #define R_ALPHA_GOTDTPREL       32
  40 #define R_ALPHA_DTPREL64        33
  41 #define R_ALPHA_DTPRELHI        34
  42 #define R_ALPHA_DTPRELLO        35
  43 #define R_ALPHA_DTPREL16        36
  44 #define R_ALPHA_GOTTPREL        37
  45 #define R_ALPHA_TPREL64         38
  46 #define R_ALPHA_TPRELHI         39
  47 #define R_ALPHA_TPRELLO         40
  48 #define R_ALPHA_TPREL16         41
  49
  50 #define SHF_ALPHA_GPREL         0x10000000
  51
  52 /* Legal values for e_flags field of Elf64_Ehdr.  */
  53
  54 #define EF_ALPHA_32BIT          1       /* All addresses are below 2GB */
  55
  56 /*
  57  * ELF register definitions..
  58  */
  59
  60 /*
  61  * The OSF/1 version of <sys/procfs.h> makes gregset_t 46 entries long.
  62  * I have no idea why that is so.  For now, we just leave it at 33
  63  * (32 general regs + processor status word).
  64  */
  65 #define ELF_NGREG       33
  66 #define ELF_NFPREG      32
  67
  68 typedef unsigned long elf_greg_t;
  69 typedef elf_greg_t elf_gregset_t[ELF_NGREG];
  70
  71 typedef double elf_fpreg_t;
  72 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
  73
  74 /*
  75  * This is used to ensure we don't load something for the wrong architecture.
  76  */
  77 #define elf_check_arch(x) ((x)->e_machine == EM_ALPHA)
  78
  79 /*
  80  * These are used to set parameters in the core dumps.
  81  */
  82 #define ELF_CLASS       ELFCLASS64
  83 #define ELF_DATA        ELFDATA2LSB
  84 #define ELF_ARCH        EM_ALPHA
  85
  86 #define ELF_EXEC_PAGESIZE       8192
  87
  88 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
  89    use of this is to invoke "./ld.so someprog" to test out a new version of
  90    the loader.  We need to make sure that it is out of the way of the program
  91    that it will "exec", and that there is sufficient room for the brk.  */
  92
  93 #define ELF_ET_DYN_BASE         (TASK_UNMAPPED_BASE + 0x1000000)
  94
  95 /* $0 is set by ld.so to a pointer to a function which might be
  96    registered using atexit.  This provides a mean for the dynamic
  97    linker to call DT_FINI functions for shared libraries that have
  98    been loaded before the code runs.
  99
 100    So that we can use the same startup file with static executables,
 101    we start programs with a value of 0 to indicate that there is no
 102    such function.  */
 103
 104 #define ELF_PLAT_INIT(_r, load_addr)    _r->r0 = 0
 105
 106 /* The registers are laid out in pt_regs for PAL and syscall
 107    convenience.  Re-order them for the linear elf_gregset_t.  */
 108
 109 struct pt_regs;
 110 struct thread_info;
 111 struct task_struct;
 112 extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt,
 113                             struct thread_info *ti);
 114 #define ELF_CORE_COPY_REGS(DEST, REGS) \
 115         dump_elf_thread(DEST, REGS, current_thread_info());
 116
 117 /* Similar, but for a thread other than current.  */
 118
 119 extern int dump_elf_task(elf_greg_t *dest, struct task_struct *task);
 120 #define ELF_CORE_COPY_TASK_REGS(TASK, DEST) \
 121         dump_elf_task(*(DEST), TASK)
 122
 123 /* Similar, but for the FP registers.  */
 124
 125 extern int dump_elf_task_fp(elf_fpreg_t *dest, struct task_struct *task);
 126 #define ELF_CORE_COPY_FPREGS(TASK, DEST) \
 127         dump_elf_task_fp(*(DEST), TASK)
 128
 129 /* This yields a mask that user programs can use to figure out what
 130    instruction set this CPU supports.  This is trivial on Alpha,
 131    but not so on other machines. */
 132
 133 #define ELF_HWCAP  (~amask(-1))
 134
 135 /* This yields a string that ld.so will use to load implementation
 136    specific libraries for optimization.  This is more specific in
 137    intent than poking at uname or /proc/cpuinfo.  */
 138
 139 #define ELF_PLATFORM                            \
 140 ({                                              \
 141         enum implver_enum i_ = implver();       \
 142         ( i_ == IMPLVER_EV4 ? "ev4"             \
 143         : i_ == IMPLVER_EV5                     \
 144           ? (amask(AMASK_BWX) ? "ev5" : "ev56") \
 145         : amask (AMASK_CIX) ? "ev6" : "ev67");  \
 146 })
 147
 148 #define SET_PERSONALITY(EX)                                     \
 149         set_personality(((EX).e_flags & EF_ALPHA_32BIT)         \
 150            ? PER_LINUX_32BIT : PER_LINUX)
 151
 152 extern int alpha_l1i_cacheshape;
 153 extern int alpha_l1d_cacheshape;
 154 extern int alpha_l2_cacheshape;
 155 extern int alpha_l3_cacheshape;
 156
 157 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
 158 #define ARCH_DLINFO                                             \
 159   do {                                                          \
 160     NEW_AUX_ENT(AT_L1I_CACHESHAPE, alpha_l1i_cacheshape);       \
 161     NEW_AUX_ENT(AT_L1D_CACHESHAPE, alpha_l1d_cacheshape);       \
 162     NEW_AUX_ENT(AT_L2_CACHESHAPE, alpha_l2_cacheshape);         \
 163     NEW_AUX_ENT(AT_L3_CACHESHAPE, alpha_l3_cacheshape);         \
 164   } while (0)
 165
 166 #endif /* __ASM_ALPHA_ELF_H */