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dl-machine.h

/* Machine-dependent ELF dynamic relocation inline functions.  Sparc64 version.
   Copyright (C) 1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#define ELF_MACHINE_NAME "sparc64"

#include <string.h>
#include <sys/param.h>
#include <ldsodefs.h>
#include <sysdep.h>

#ifndef VALIDX
# define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \
                  + DT_EXTRANUM + DT_VALTAGIDX (tag))
#endif

#define ELF64_R_TYPE_ID(info) ((info) & 0xff)
#define ELF64_R_TYPE_DATA(info) ((info) >> 8)

/* Return nonzero iff ELF header is compatible with the running host.  */
static inline int
elf_machine_matches_host (const Elf64_Ehdr *ehdr)
{
  return ehdr->e_machine == EM_SPARCV9;
}

/* We have to do this because elf_machine_{dynamic,load_address} can be
   invoked from functions that have no GOT references, and thus the compiler
   has no obligation to load the PIC register.  */
#define LOAD_PIC_REG(PIC_REG) \
do {  Elf64_Addr tmp;         \
      __asm("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t" \
            "rd %%pc, %0\n\t" \
            "add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t" \
            "add %0, %1, %0" \
            : "=r" (PIC_REG), "=r" (tmp)); \
} while (0)

/* Return the link-time address of _DYNAMIC.  Conveniently, this is the
   first element of the GOT.  This must be inlined in a function which
   uses global data.  */
static inline Elf64_Addr
elf_machine_dynamic (void)
{
  register Elf64_Addr *elf_pic_register __asm__("%l7");

  LOAD_PIC_REG (elf_pic_register);

  return *elf_pic_register;
}

/* Return the run-time load address of the shared object.  */
static inline Elf64_Addr
elf_machine_load_address (void)
{
  register Elf32_Addr *pc __asm ("%o7");
  register Elf64_Addr *got __asm ("%l7");

  __asm ("sethi %%hi(_GLOBAL_OFFSET_TABLE_-4), %1\n\t"
         "call 1f\n\t"
         " add %1, %%lo(_GLOBAL_OFFSET_TABLE_+4), %1\n\t"
         "call _DYNAMIC\n\t"
         "call _GLOBAL_OFFSET_TABLE_\n"
         "1:\tadd %1, %0, %1\n\t" : "=r" (pc), "=r" (got));

  /* got is now l_addr + _GLOBAL_OFFSET_TABLE_
     *got is _DYNAMIC
     pc[2]*4 is l_addr + _DYNAMIC - (long)pc - 8
     pc[3]*4 is l_addr + _GLOBAL_OFFSET_TABLE_ - (long)pc - 12  */
  return (Elf64_Addr) got - *got + (Elf32_Sword) ((pc[2] - pc[3]) * 4) - 4;
}

/* We have 4 cases to handle.  And we code different code sequences
   for each one.  I love V9 code models...  */
static inline void
sparc64_fixup_plt (struct link_map *map, const Elf64_Rela *reloc,
               Elf64_Addr *reloc_addr, Elf64_Addr value,
               Elf64_Addr high, int t)
{
  unsigned int *insns = (unsigned int *) reloc_addr;
  Elf64_Addr plt_vaddr = (Elf64_Addr) reloc_addr;
  Elf64_Sxword disp = value - plt_vaddr;

  /* Now move plt_vaddr up to the call instruction.  */
  plt_vaddr += ((t + 1) * 4);

  /* PLT entries .PLT32768 and above look always the same.  */
  if (__builtin_expect (high, 0) != 0)
    {
      *reloc_addr = value - map->l_addr;
    }
  /* Near destination.  */
  else if (disp >= -0x800000 && disp < 0x800000)
    {
      /* As this is just one instruction, it is thread safe and so
       we can avoid the unnecessary sethi FOO, %g1.
       b,a target  */
      insns[0] = 0x30800000 | ((disp >> 2) & 0x3fffff);
      __asm __volatile ("flush %0" : : "r" (insns));
    }
  /* 32-bit Sparc style, the target is in the lower 32-bits of
     address space.  */
  else if (insns += t, (value >> 32) == 0)
    {
      /* sethi    %hi(target), %g1
       jmpl %g1 + %lo(target), %g0  */

      insns[1] = 0x81c06000 | (value & 0x3ff);
      __asm __volatile ("flush %0 + 4" : : "r" (insns));

      insns[0] = 0x03000000 | ((unsigned int)(value >> 10));
      __asm __volatile ("flush %0" : : "r" (insns));
    }
  /* We can also get somewhat simple sequences if the distance between
     the target and the PLT entry is within +/- 2GB.  */
  else if ((plt_vaddr > value
          && ((plt_vaddr - value) >> 31) == 0)
         || (value > plt_vaddr
             && ((value - plt_vaddr) >> 31) == 0))
    {
      unsigned int displacement;

      if (plt_vaddr > value)
      displacement = (0 - (plt_vaddr - value));
      else
      displacement = value - plt_vaddr;

      /* mov      %o7, %g1
       call displacement
        mov %g1, %o7  */

      insns[2] = 0x9e100001;
      __asm __volatile ("flush %0 + 8" : : "r" (insns));

      insns[1] = 0x40000000 | (displacement >> 2);
      __asm __volatile ("flush %0 + 4" : : "r" (insns));

      insns[0] = 0x8210000f;
      __asm __volatile ("flush %0" : : "r" (insns));
    }
  /* Worst case, ho hum...  */
  else
    {
      unsigned int high32 = (value >> 32);
      unsigned int low32 = (unsigned int) value;

      /* ??? Some tricks can be stolen from the sparc64 egcs backend
           constant formation code I wrote.  -DaveM  */

      if (__builtin_expect (high32 & 0x3ff, 0))
      {
        /* sethi  %hh(value), %g1
           sethi  %lm(value), %g5
           or           %g1, %hm(value), %g1
           or           %g5, %lo(value), %g5
           sllx   %g1, 32, %g1
           jmpl   %g1 + %g5, %g0
            nop  */

        insns[5] = 0x81c04005;
        __asm __volatile ("flush %0 + 20" : : "r" (insns));

        insns[4] = 0x83287020;
        __asm __volatile ("flush %0 + 16" : : "r" (insns));

        insns[3] = 0x8a116000 | (low32 & 0x3ff);
        __asm __volatile ("flush %0 + 12" : : "r" (insns));

        insns[2] = 0x82106000 | (high32 & 0x3ff);
      }
      else
      {
        /* sethi  %hh(value), %g1
           sethi  %lm(value), %g5
           sllx   %g1, 32, %g1
           or           %g5, %lo(value), %g5
           jmpl   %g1 + %g5, %g0
            nop  */

        insns[4] = 0x81c04005;
        __asm __volatile ("flush %0 + 16" : : "r" (insns));

        insns[3] = 0x8a116000 | (low32 & 0x3ff);
        __asm __volatile ("flush %0 + 12" : : "r" (insns));

        insns[2] = 0x83287020;
      }

      __asm __volatile ("flush %0 + 8" : : "r" (insns));

      insns[1] = 0x0b000000 | (low32 >> 10);
      __asm __volatile ("flush %0 + 4" : : "r" (insns));

      insns[0] = 0x03000000 | (high32 >> 10);
      __asm __volatile ("flush %0" : : "r" (insns));
    }
}

static inline Elf64_Addr
elf_machine_fixup_plt (struct link_map *map, lookup_t t,
                   const Elf64_Rela *reloc,
                   Elf64_Addr *reloc_addr, Elf64_Addr value)
{
  sparc64_fixup_plt (map, reloc, reloc_addr, value + reloc->r_addend,
                 reloc->r_addend, 1);
  return value;
}

/* Return the final value of a plt relocation.  */
static inline Elf64_Addr
elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
                   Elf64_Addr value)
{
  /* Don't add addend here, but in elf_machine_fixup_plt instead.
     value + reloc->r_addend is the value which should actually be
     stored into .plt data slot.  */
  return value;
}

#ifdef RESOLVE

/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
   MAP is the object containing the reloc.  */

static inline void
elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
              const Elf64_Sym *sym, const struct r_found_version *version,
              Elf64_Addr *const reloc_addr)
{
  const unsigned long int r_type = ELF64_R_TYPE_ID (reloc->r_info);

#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
  if (__builtin_expect (r_type == R_SPARC_RELATIVE, 0))
    *reloc_addr = map->l_addr + reloc->r_addend;
# ifndef RTLD_BOOTSTRAP
  else if (r_type == R_SPARC_NONE) /* Who is Wilbur? */
    return;
# endif
  else
#endif
    {
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
      const Elf64_Sym *const refsym = sym;
#endif
      Elf64_Addr value;
#ifndef RESOLVE_CONFLICT_FIND_MAP
      if (sym->st_shndx != SHN_UNDEF &&
        ELF64_ST_BIND (sym->st_info) == STB_LOCAL)
      value = map->l_addr;
      else
      {
        value = RESOLVE (&sym, version, r_type);
        if (sym)
          value += sym->st_value;
      }
#else
      value = 0;
#endif
      value += reloc->r_addend;     /* Assume copy relocs have zero addend.  */

      switch (r_type)
      {
#if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
      case R_SPARC_COPY:
        if (sym == NULL)
          /* This can happen in trace mode if an object could not be
             found.  */
          break;
        if (sym->st_size > refsym->st_size
            || (GL(dl_verbose) && sym->st_size < refsym->st_size))
          {
            const char *strtab;

            strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
            _dl_error_printf ("\
%s: Symbol `%s' has different size in shared object, consider re-linking\n",
                        rtld_progname ?: "<program name unknown>",
                        strtab + refsym->st_name);
          }
        memcpy (reloc_addr, (void *) value, MIN (sym->st_size,
                                       refsym->st_size));
        break;
#endif
      case R_SPARC_64:
      case R_SPARC_GLOB_DAT:
        *reloc_addr = value;
        break;
#ifndef RTLD_BOOTSTRAP
      case R_SPARC_8:
        *(char *) reloc_addr = value;
        break;
      case R_SPARC_16:
        *(short *) reloc_addr = value;
        break;
      case R_SPARC_32:
        *(unsigned int *) reloc_addr = value;
        break;
      case R_SPARC_DISP8:
        *(char *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
        break;
      case R_SPARC_DISP16:
        *(short *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
        break;
      case R_SPARC_DISP32:
        *(unsigned int *) reloc_addr = (value - (Elf64_Addr) reloc_addr);
        break;
      case R_SPARC_WDISP30:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & 0xc0000000) |
           ((value - (Elf64_Addr) reloc_addr) >> 2));
        break;

      /* MEDLOW code model relocs */
      case R_SPARC_LO10:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & ~0x3ff) |
           (value & 0x3ff));
        break;
      case R_SPARC_HI22:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & 0xffc00000) |
           (value >> 10));
        break;
      case R_SPARC_OLO10:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & ~0x1fff) |
           (((value & 0x3ff) + ELF64_R_TYPE_DATA (reloc->r_info)) & 0x1fff));
        break;

      /* MEDMID code model relocs */
      case R_SPARC_H44:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & 0xffc00000) |
           (value >> 22));
        break;
      case R_SPARC_M44:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & ~0x3ff) |
           ((value >> 12) & 0x3ff));
        break;
      case R_SPARC_L44:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & ~0xfff) |
           (value & 0xfff));
        break;

      /* MEDANY code model relocs */
      case R_SPARC_HH22:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & 0xffc00000) |
           (value >> 42));
        break;
      case R_SPARC_HM10:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & ~0x3ff) |
           ((value >> 32) & 0x3ff));
        break;
      case R_SPARC_LM22:
        *(unsigned int *) reloc_addr =
          ((*(unsigned int *)reloc_addr & 0xffc00000) |
           ((value >> 10) & 0x003fffff));
        break;
#endif
      case R_SPARC_JMP_SLOT:
#ifdef RESOLVE_CONFLICT_FIND_MAP
        /* R_SPARC_JMP_SLOT conflicts against .plt[32768+]
           relocs should be turned into R_SPARC_64 relocs
           in .gnu.conflict section.
           r_addend non-zero does not mean it is a .plt[32768+]
           reloc, instead it is the actual address of the function
           to call.  */
        sparc64_fixup_plt (NULL, reloc, reloc_addr, value, 0, 0);
#else
        sparc64_fixup_plt (map, reloc, reloc_addr, value,
                       reloc->r_addend, 0);
#endif
        break;
#ifndef RTLD_BOOTSTRAP
      case R_SPARC_UA16:
        ((unsigned char *) reloc_addr) [0] = value >> 8;
        ((unsigned char *) reloc_addr) [1] = value;
        break;
      case R_SPARC_UA32:
        ((unsigned char *) reloc_addr) [0] = value >> 24;
        ((unsigned char *) reloc_addr) [1] = value >> 16;
        ((unsigned char *) reloc_addr) [2] = value >> 8;
        ((unsigned char *) reloc_addr) [3] = value;
        break;
      case R_SPARC_UA64:
        if (! ((long) reloc_addr & 3))
          {
            /* Common in .eh_frame */
            ((unsigned int *) reloc_addr) [0] = value >> 32;
            ((unsigned int *) reloc_addr) [1] = value;
            break;
          }
        ((unsigned char *) reloc_addr) [0] = value >> 56;
        ((unsigned char *) reloc_addr) [1] = value >> 48;
        ((unsigned char *) reloc_addr) [2] = value >> 40;
        ((unsigned char *) reloc_addr) [3] = value >> 32;
        ((unsigned char *) reloc_addr) [4] = value >> 24;
        ((unsigned char *) reloc_addr) [5] = value >> 16;
        ((unsigned char *) reloc_addr) [6] = value >> 8;
        ((unsigned char *) reloc_addr) [7] = value;
        break;
#endif
#if !defined RTLD_BOOTSTRAP || defined _NDEBUG
      default:
        _dl_reloc_bad_type (map, r_type, 0);
        break;
#endif
      }
    }
}

static inline void
elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
                     Elf64_Addr *const reloc_addr)
{
  *reloc_addr = l_addr + reloc->r_addend;
}

static inline void
elf_machine_lazy_rel (struct link_map *map,
                  Elf64_Addr l_addr, const Elf64_Rela *reloc)
{
  switch (ELF64_R_TYPE (reloc->r_info))
    {
    case R_SPARC_NONE:
      break;
    case R_SPARC_JMP_SLOT:
      break;
    default:
      _dl_reloc_bad_type (map, ELFW(R_TYPE) (reloc->r_info), 1);
      break;
    }
}

#endif      /* RESOLVE */

/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
   PLT entries should not be allowed to define the value.
   ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
   of the main executable's symbols, as for a COPY reloc.  */
#define elf_machine_type_class(type) \
  ((((type) == R_SPARC_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)     \
   | (((type) == R_SPARC_COPY) * ELF_RTYPE_CLASS_COPY))

/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
#define ELF_MACHINE_JMP_SLOT  R_SPARC_JMP_SLOT

/* The SPARC never uses Elf64_Rel relocations.  */
#define ELF_MACHINE_NO_REL 1

/* The SPARC overlaps DT_RELA and DT_PLTREL.  */
#define ELF_MACHINE_PLTREL_OVERLAP 1

/* Set up the loaded object described by L so its unrelocated PLT
   entries will jump to the on-demand fixup code in dl-runtime.c.  */

static inline int
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
  if (l->l_info[DT_JMPREL] && lazy)
    {
      extern void _dl_runtime_resolve_0 (void);
      extern void _dl_runtime_resolve_1 (void);
      extern void _dl_runtime_profile_0 (void);
      extern void _dl_runtime_profile_1 (void);
      Elf64_Addr res0_addr, res1_addr;
      unsigned int *plt = (void *) D_PTR (l, l_info[DT_PLTGOT]);
      int i = 0;

      if (! profile)
      {
        res0_addr = (Elf64_Addr) &_dl_runtime_resolve_0;
        res1_addr = (Elf64_Addr) &_dl_runtime_resolve_1;
      }
      else
      {
        res0_addr = (Elf64_Addr) &_dl_runtime_profile_0;
        res1_addr = (Elf64_Addr) &_dl_runtime_profile_1;
        if (_dl_name_match_p (GL(dl_profile), l))
          GL(dl_profile_map) = l;
      }

      /* PLT0 looks like:

       save %sp, -192, %sp
       sethi      %hh(_dl_runtime_{resolve,profile}_0), %l0
       sethi      %lm(_dl_runtime_{resolve,profile}_0), %l1
       or   %l0, %hm(_dl_runtime_{resolve,profile}_0), %l0
       or   %l1, %lo(_dl_runtime_{resolve,profile}_0), %l1
       sllx %l0, 32, %l0
       jmpl %l0 + %l1, %l6
        sethi     %hi(0xffc00), %l2
       */

      plt[0] = 0x9de3bf40;
      plt[1] = 0x21000000 | (res0_addr >> (64 - 22));
      plt[2] = 0x23000000 | ((res0_addr >> 10) & 0x003fffff);
      plt[3] = 0xa0142000 | ((res0_addr >> 32) & 0x3ff);
      plt[4] = 0xa2146000 | (res0_addr & 0x3ff);
      plt[5] = 0xa12c3020;
      plt[6] = 0xadc40011;
      plt[7] = 0x250003ff;

      /* PLT1 looks like:

       save %sp, -192, %sp
       sethi      %hh(_dl_runtime_{resolve,profile}_1), %l0
       sethi      %lm(_dl_runtime_{resolve,profile}_1), %l1
       or   %l0, %hm(_dl_runtime_{resolve,profile}_1), %l0
       or   %l1, %lo(_dl_runtime_{resolve,profile}_1), %l1
       sllx %l0, 32, %l0
       jmpl %l0 + %l1, %l6
        srlx      %g1, 12, %o1
       */

      plt[8 + 0] = 0x9de3bf40;
      if (__builtin_expect (((res1_addr + 4) >> 32) & 0x3ff, 0))
      i = 1;
      else
      res1_addr += 4;
      plt[8 + 1] = 0x21000000 | (res1_addr >> (64 - 22));
      plt[8 + 2] = 0x23000000 | ((res1_addr >> 10) & 0x003fffff);
      if (__builtin_expect (i, 0))
      plt[8 + 3] = 0xa0142000 | ((res1_addr >> 32) & 0x3ff);
      else
      plt[8 + 3] = 0xa12c3020;
      plt[8 + 4] = 0xa2146000 | (res1_addr & 0x3ff);
      if (__builtin_expect (i, 0))
      plt[8 + 5] = 0xa12c3020;
      plt[8 + 5 + i] = 0xadc40011;
      plt[8 + 6 + i] = 0x9330700c;

      /* Now put the magic cookie at the beginning of .PLT2
       Entry .PLT3 is unused by this implementation.  */
      *((struct link_map **)(&plt[16 + 0])) = l;

      if (__builtin_expect (l->l_info[VALIDX(DT_GNU_PRELINKED)] != NULL, 0)
        || __builtin_expect (l->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL, 0))
      {
        /* Need to reinitialize .plt to undo prelinking.  */
        Elf64_Rela *rela = (Elf64_Rela *) D_PTR (l, l_info[DT_JMPREL]);
        Elf64_Rela *relaend
          = (Elf64_Rela *) ((char *) rela
                        + l->l_info[DT_PLTRELSZ]->d_un.d_val);

        /* prelink must ensure there are no R_SPARC_NONE relocs left
           in .rela.plt.  */
        while (rela < relaend)
          {
            if (__builtin_expect (rela->r_addend, 0) != 0)
            {
                  Elf64_Addr slot = ((rela->r_offset + 0x400
                              - (Elf64_Addr) plt)
                             / 0x1400) * 0x1400
                            + (Elf64_Addr) plt - 0x400;
              /* ldx [%o7 + X], %g1  */
              unsigned int first_ldx = *(unsigned int *)(slot + 12);
              Elf64_Addr ptr = slot + (first_ldx & 0xfff) + 4;

              *(Elf64_Addr *) rela->r_offset
                = (Elf64_Addr) plt
                  - (slot + ((rela->r_offset - ptr) / 8) * 24 + 4);
              ++rela;
              continue;
            }

            *(unsigned int *) rela->r_offset
            = 0x03000000 | (rela->r_offset - (Elf64_Addr) plt);
            *(unsigned int *) (rela->r_offset + 4)
            = 0x30680000 | ((((Elf64_Addr) plt + 32
                          - rela->r_offset - 4) >> 2) & 0x7ffff);
            __asm __volatile ("flush %0" : : "r" (rela->r_offset));
            __asm __volatile ("flush %0+4" : : "r" (rela->r_offset));
            ++rela;
          }
      }
    }

  return lazy;
}

/* This code is used in dl-runtime.c to call the `fixup' function
   and then redirect to the address it returns.  */
#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name)   \
  asm ("\n"                               \
"     .text\n"                            \
"     .globl      " #tramp_name "_0\n"                \
"     .type " #tramp_name "_0, @function\n"           \
"     .align      32\n"                         \
"\t" #tramp_name "_0:\n"                        \
"     ! sethi   %hi(1047552), %l2 - Done in .PLT0\n"  \
"     ldx   [%l6 + 32 + 8], %o0\n"              \
"     sub     %g1, %l6, %l0\n"                  \
"     xor     %l2, -1016, %l2\n"                \
"     sethi   %hi(5120), %l3  ! 160 * 32\n"           \
"     add     %l0, %l2, %l0\n"                  \
"     sethi   %hi(32768), %l4\n"                \
"     udivx   %l0, %l3, %l3\n"                  \
"     sllx    %l3, 2, %l1\n"                    \
"     add     %l1, %l3, %l1\n"                  \
"     sllx    %l1, 10, %l2\n"                   \
"     sub   %l4, 4, %l4 ! No thanks to Sun for not obeying their own ABI\n" \
"     sllx    %l1, 5, %l1\n"                    \
"     sub     %l0, %l2, %l0\n"                  \
"     udivx   %l0, 24, %l0\n"                   \
"     add     %l0, %l4, %l0\n"                  \
"     add     %l1, %l0, %l1\n"                  \
"     add     %l1, %l1, %l0\n"                  \
"     add     %l0, %l1, %l0\n"                  \
"     mov   %i7, %o2\n"                   \
"     call  " #fixup_name "\n"                  \
"      sllx    %l0, 3, %o1\n"                   \
"     jmp   %o0\n"                              \
"      restore\n"                         \
"     .size " #tramp_name "_0, . - " #tramp_name "_0\n" \
"\n"                                      \
"     .globl      " #tramp_name "_1\n"                \
"     .type " #tramp_name "_1, @function\n"           \
"     ! tramp_name_1 + 4 needs to be .align 32\n"     \
"\t" #tramp_name "_1:\n"                        \
"     sub   %l6, 4, %l6\n"                      \
"     ! srlx      %g1, 12, %o1 - Done in .PLT1\n"           \
"     ldx   [%l6 + 12], %o0\n"                  \
"     add   %o1, %o1, %o3\n"              \
"     sub   %o1, 96, %o1      ! No thanks to Sun for not obeying their own ABI\n" \
"     mov   %i7, %o2\n"                   \
"     call  " #fixup_name "\n"                  \
"      add  %o1, %o3, %o1\n"              \
"     jmp   %o0\n"                              \
"      restore\n"                         \
"     .size " #tramp_name "_1, . - " #tramp_name "_1\n" \
"     .previous\n");

#ifndef PROF
#define ELF_MACHINE_RUNTIME_TRAMPOLINE                \
  TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup);   \
  TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
#else
#define ELF_MACHINE_RUNTIME_TRAMPOLINE                \
  TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup);   \
  TRAMPOLINE_TEMPLATE (_dl_runtime_profile, fixup);
#endif

/* The PLT uses Elf64_Rela relocs.  */
#define elf_machine_relplt elf_machine_rela

/* Initial entry point code for the dynamic linker.
   The C function `_dl_start' is the real entry point;
   its return value is the user program's entry point.  */

#define __S1(x)   #x
#define __S(x)    __S1(x)

#define RTLD_START __asm__ ( "\n"                           \
"     .text\n"                                        \
"     .global     _start\n"                                 \
"     .type _start, @function\n"                            \
"     .align      32\n"                                     \
"_start:\n"                                           \
"   /* Make room for functions to drop their arguments on the stack.  */\n" \
"     sub   %sp, 6*8, %sp\n"                          \
"   /* Pass pointer to argument block to _dl_start.  */\n"        \
"     call  _dl_start\n"                                    \
"      add   %sp," __S(STACK_BIAS) "+22*8,%o0\n"                  \
"     /* FALLTHRU */\n"                               \
"     .size _start, .-_start\n"                             \
"\n"                                                  \
"     .global     _dl_start_user\n"                         \
"     .type _dl_start_user, @function\n"                    \
"_dl_start_user:\n"                                         \
"   /* Load the GOT register.  */\n"                              \
"1:   call  11f\n"                                          \
"      sethi      %hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n"       \
"11:  or    %l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7\n"        \
"  /* Store the highest stack address.  */\n"                     \
"     sethi %hi(__libc_stack_end), %g5\n"                   \
"     add   %l7, %o7, %l7\n"                          \
"     or    %g5, %lo(__libc_stack_end), %g5\n"              \
"   /* Save the user entry point address in %l0.  */\n"                 \
"     mov   %o0, %l0\n"                               \
"     ldx   [%l7 + %g5], %l1\n"                             \
"     sethi %hi(_dl_skip_args), %g5\n"                      \
"     add   %sp, 6*8, %l2\n"                          \
"   /* See if we were run as a command with the executable file name as an\n" \
"      extra leading argument.  If so, we must shift things around since we\n" \
"      must keep the stack doubleword aligned.  */\n"             \
"     or    %g5, %lo(_dl_skip_args), %g5\n"                       \
"     stx   %l2, [%l1]\n"                                   \
"     ldx   [%l7 + %g5], %i0\n"                             \
"     ld    [%i0], %i0\n"                                   \
"     brz,pt      %i0, 2f\n"                                \
"      ldx  [%sp + " __S(STACK_BIAS) " + 22*8], %i5\n"            \
"     /* Find out how far to shift.  */\n"                        \
"     sethi %hi(_dl_argv), %l4\n"                           \
"     sub   %i5, %i0, %i5\n"                          \
"     or    %l4, %lo(_dl_argv), %l4\n"                      \
"     sllx  %i0, 3, %l6\n"                                  \
"     ldx   [%l7 + %l4], %l4\n"                             \
"     stx   %i5, [%sp + " __S(STACK_BIAS) " + 22*8]\n"            \
"     add   %sp, " __S(STACK_BIAS) " + 23*8, %i1\n"               \
"     add   %i1, %l6, %i2\n"                          \
"     ldx   [%l4], %l5\n"                                   \
"     /* Copy down argv.  */\n"                             \
"12:  ldx   [%i2], %i3\n"                                   \
"     add   %i2, 8, %i2\n"                                  \
"     stx   %i3, [%i1]\n"                                   \
"     brnz,pt     %i3, 12b\n"                               \
"      add  %i1, 8, %i1\n"                                  \
"     sub   %l5, %l6, %l5\n"                          \
"     /* Copy down envp.  */\n"                             \
"13:  ldx   [%i2], %i3\n"                                   \
"     add   %i2, 8, %i2\n"                                  \
"     stx   %i3, [%i1]\n"                                   \
"     brnz,pt     %i3, 13b\n"                               \
"      add  %i1, 8, %i1\n"                                  \
"     /* Copy down auxiliary table.  */\n"                        \
"14:  ldx   [%i2], %i3\n"                                   \
"     ldx   [%i2 + 8], %i4\n"                         \
"     add   %i2, 16, %i2\n"                                 \
"     stx   %i3, [%i1]\n"                                   \
"     stx   %i4, [%i1 + 8]\n"                         \
"     brnz,pt     %i3, 14b\n"                               \
"      add  %i1, 16, %i1\n"                                 \
"     stx   %l5, [%l4]\n"                                   \
"  /* %o0 = _dl_loaded, %o1 = argc, %o2 = argv, %o3 = envp.  */\n"      \
"2:   sethi %hi(_rtld_local), %o0\n"                        \
"     add   %sp, " __S(STACK_BIAS) " + 23*8, %o2\n"               \
"     orcc  %o0, %lo(_rtld_local), %o0\n"                   \
"     sllx  %i5, 3, %o3\n"                                  \
"     ldx   [%l7 + %o0], %o0\n"                             \
"     add   %o3, 8, %o3\n"                                  \
"     mov   %i5, %o1\n"                               \
"     add   %o2, %o3, %o3\n"                          \
"     call  _dl_init_internal\n"                            \
"      ldx  [%o0], %o0\n"                                   \
"   /* Pass our finalizer function to the user in %g1.  */\n"           \
"     sethi %hi(_dl_fini), %g1\n"                           \
"     or    %g1, %lo(_dl_fini), %g1\n"                      \
"     ldx   [%l7 + %g1], %g1\n"                             \
"  /* Jump to the user's entry point and deallocate the extra stack we got.  */\n" \
"     jmp   %l0\n"                                          \
"      add  %sp, 6*8, %sp\n"                          \
"     .size _dl_start_user, . - _dl_start_user\n"                 \
"     .previous\n");

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