sysdeps/powerpc/powerpc32/dl-machine.c - nest-cam/v366/glibc - Git at Google

 /* Machine-dependent ELF dynamic relocation functions.  PowerPC version.
    Copyright (C) 1995-2006, 2008 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.  */

 #include <unistd.h>
 #include <string.h>
 #include <sys/param.h>
 #include <link.h>
 #include <ldsodefs.h>
 #include <elf/dynamic-link.h>
 #include <dl-machine.h>
 #include <stdio-common/_itoa.h>

 /* The value __cache_line_size is defined in dl-sysdep.c and is initialised
    by _dl_sysdep_start via DL_PLATFORM_INIT.  */
 extern int __cache_line_size attribute_hidden;

 /* Because ld.so is now versioned, these functions can be in their own file;
    no relocations need to be done to call them.
    Of course, if ld.so is not versioned...  */
 #if defined SHARED && !(DO_VERSIONING - 0)
 #error This will not work with versioning turned off, sorry.
 #endif


 /* Stuff for the PLT.  */
 #define PLT_INITIAL_ENTRY_WORDS 18
 #define PLT_LONGBRANCH_ENTRY_WORDS 0
 #define PLT_TRAMPOLINE_ENTRY_WORDS 6
 #define PLT_DOUBLE_SIZE (1<<13)
 #define PLT_ENTRY_START_WORDS(entry_number) \
   (PLT_INITIAL_ENTRY_WORDS + (entry_number)*2				\
    + ((entry_number) > PLT_DOUBLE_SIZE					\
       ? ((entry_number) - PLT_DOUBLE_SIZE)*2				\
       : 0))
 #define PLT_DATA_START_WORDS(num_entries) PLT_ENTRY_START_WORDS(num_entries)

 /* Macros to build PowerPC opcode words.  */
 #define OPCODE_ADDI(rd,ra,simm) \
   (0x38000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
 #define OPCODE_ADDIS(rd,ra,simm) \
   (0x3c000000 | (rd) << 21 | (ra) << 16 | ((simm) & 0xffff))
 #define OPCODE_ADD(rd,ra,rb) \
   (0x7c000214 | (rd) << 21 | (ra) << 16 | (rb) << 11)
 #define OPCODE_B(target) (0x48000000 | ((target) & 0x03fffffc))
 #define OPCODE_BA(target) (0x48000002 | ((target) & 0x03fffffc))
 #define OPCODE_BCTR() 0x4e800420
 #define OPCODE_LWZ(rd,d,ra) \
   (0x80000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
 #define OPCODE_LWZU(rd,d,ra) \
   (0x84000000 | (rd) << 21 | (ra) << 16 | ((d) & 0xffff))
 #define OPCODE_MTCTR(rd) (0x7C0903A6 | (rd) << 21)
 #define OPCODE_RLWINM(ra,rs,sh,mb,me) \
   (0x54000000 | (rs) << 21 | (ra) << 16 | (sh) << 11 | (mb) << 6 | (me) << 1)

 #define OPCODE_LI(rd,simm)    OPCODE_ADDI(rd,0,simm)
 #define OPCODE_ADDIS_HI(rd,ra,value) \
   OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16)
 #define OPCODE_LIS_HI(rd,value) OPCODE_ADDIS_HI(rd,0,value)
 #define OPCODE_SLWI(ra,rs,sh) OPCODE_RLWINM(ra,rs,sh,0,31-sh)


 #define PPC_DCBST(where) asm volatile ("dcbst 0,%0" : : "r"(where) : "memory")
 #define PPC_SYNC asm volatile ("sync" : : : "memory")
 #define PPC_ISYNC asm volatile ("sync; isync" : : : "memory")
 #define PPC_ICBI(where) asm volatile ("icbi 0,%0" : : "r"(where) : "memory")
 #define PPC_DIE asm volatile ("tweq 0,0")

 /* Use this when you've modified some code, but it won't be in the
    instruction fetch queue (or when it doesn't matter if it is). */
 #define MODIFIED_CODE_NOQUEUE(where) \
      do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); } while (0)
 /* Use this when it might be in the instruction queue. */
 #define MODIFIED_CODE(where) \
      do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); PPC_ISYNC; } while (0)


 /* The idea here is that to conform to the ABI, we are supposed to try
    to load dynamic objects between 0x10000 (we actually use 0x40000 as
    the lower bound, to increase the chance of a memory reference from
    a null pointer giving a segfault) and the program's load address;
    this may allow us to use a branch instruction in the PLT rather
    than a computed jump.  The address is only used as a preference for
    mmap, so if we get it wrong the worst that happens is that it gets
    mapped somewhere else.  */

 ElfW(Addr)
 __elf_preferred_address (struct link_map *loader, size_t maplength,
 			 ElfW(Addr) mapstartpref)
 {
   ElfW(Addr) low, high;
   struct link_map *l;
   Lmid_t nsid;

   /* If the object has a preference, load it there!  */
   if (mapstartpref != 0)
     return mapstartpref;

   /* Otherwise, quickly look for a suitable gap between 0x3FFFF and
      0x70000000.  0x3FFFF is so that references off NULL pointers will
      cause a segfault, 0x70000000 is just paranoia (it should always
      be superceded by the program's load address).  */
   low =  0x0003FFFF;
   high = 0x70000000;
   for (nsid = 0; nsid < DL_NNS; ++nsid)
     for (l = GL(dl_ns)[nsid]._ns_loaded; l; l = l->l_next)
       {
 	ElfW(Addr) mapstart, mapend;
 	mapstart = l->l_map_start & ~(GLRO(dl_pagesize) - 1);
 	mapend = l->l_map_end | (GLRO(dl_pagesize) - 1);
 	assert (mapend > mapstart);

 	/* Prefer gaps below the main executable, note that l ==
 	   _dl_loaded does not work for static binaries loading
 	   e.g. libnss_*.so.  */
 	if ((mapend >= high || l->l_type == lt_executable)
   	    && high >= mapstart)
 	  high = mapstart;
 	else if (mapend >= low && low >= mapstart)
 	  low = mapend;
 	else if (high >= mapend && mapstart >= low)
 	  {
 	    if (high - mapend >= mapstart - low)
 	      low = mapend;
 	    else
 	      high = mapstart;
 	  }
       }

   high -= 0x10000; /* Allow some room between objects.  */
   maplength = (maplength | (GLRO(dl_pagesize) - 1)) + 1;
   if (high <= low || high - low < maplength )
     return 0;
   return high - maplength;  /* Both high and maplength are page-aligned.  */
 }

 /* 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.
    Also install a small trampoline to be used by entries that have
    been relocated to an address too far away for a single branch.  */

 /* There are many kinds of PLT entries:

    (1)	A direct jump to the actual routine, either a relative or
 	absolute branch.  These are set up in __elf_machine_fixup_plt.

    (2)	Short lazy entries.  These cover the first 8192 slots in
         the PLT, and look like (where 'index' goes from 0 to 8191):

 	li %r11, index*4
 	b  &plt[PLT_TRAMPOLINE_ENTRY_WORDS+1]

    (3)	Short indirect jumps.  These replace (2) when a direct jump
 	wouldn't reach.  They look the same except that the branch
 	is 'b &plt[PLT_LONGBRANCH_ENTRY_WORDS]'.

    (4)  Long lazy entries.  These cover the slots when a short entry
 	won't fit ('index*4' overflows its field), and look like:

 	lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS])
 	lwzu %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS])
 	b  &plt[PLT_TRAMPOLINE_ENTRY_WORDS]
 	bctr

    (5)	Long indirect jumps.  These replace (4) when a direct jump
 	wouldn't reach.  They look like:

 	lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS])
 	lwz %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS])
 	mtctr %r12
 	bctr

    (6) Long direct jumps.  These are used when thread-safety is not
        required.  They look like:

        lis %r12, %hi(finaladdr)
        addi %r12, %r12, %lo(finaladdr)
        mtctr %r12
        bctr


    The lazy entries, (2) and (4), are set up here in
    __elf_machine_runtime_setup.  (1), (3), and (5) are set up in
    __elf_machine_fixup_plt.  (1), (3), and (6) can also be constructed
    in __process_machine_rela.

    The reason for the somewhat strange construction of the long
    entries, (4) and (5), is that we need to ensure thread-safety.  For
    (1) and (3), this is obvious because only one instruction is
    changed and the PPC architecture guarantees that aligned stores are
    atomic.  For (5), this is more tricky.  When changing (4) to (5),
    the `b' instruction is first changed to to `mtctr'; this is safe
    and is why the `lwzu' instruction is not just a simple `addi'.
    Once this is done, and is visible to all processors, the `lwzu' can
    safely be changed to a `lwz'.  */
 int
 __elf_machine_runtime_setup (struct link_map *map, int lazy, int profile)
 {
   if (map->l_info[DT_JMPREL])
     {
       Elf32_Word i;
       Elf32_Word *plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
       Elf32_Word num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
 				    / sizeof (Elf32_Rela));
       Elf32_Word rel_offset_words = PLT_DATA_START_WORDS (num_plt_entries);
       Elf32_Word data_words = (Elf32_Word) (plt + rel_offset_words);
       Elf32_Word size_modified;

       extern void _dl_runtime_resolve (void);
       extern void _dl_prof_resolve (void);

       /* Convert the index in r11 into an actual address, and get the
 	 word at that address.  */
       plt[PLT_LONGBRANCH_ENTRY_WORDS] = OPCODE_ADDIS_HI (11, 11, data_words);
       plt[PLT_LONGBRANCH_ENTRY_WORDS + 1] = OPCODE_LWZ (11, data_words, 11);

       /* Call the procedure at that address.  */
       plt[PLT_LONGBRANCH_ENTRY_WORDS + 2] = OPCODE_MTCTR (11);
       plt[PLT_LONGBRANCH_ENTRY_WORDS + 3] = OPCODE_BCTR ();

       if (lazy)
 	{
 	  Elf32_Word *tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS;
 	  Elf32_Word dlrr = (Elf32_Word)(profile
 					 ? _dl_prof_resolve
 					 : _dl_runtime_resolve);
 	  Elf32_Word offset;

 	  if (profile && GLRO(dl_profile) != NULL
 	      && _dl_name_match_p (GLRO(dl_profile), map))
 	    /* This is the object we are looking for.  Say that we really
 	       want profiling and the timers are started.  */
 	    GL(dl_profile_map) = map;

 	  /* For the long entries, subtract off data_words.  */
 	  tramp[0] = OPCODE_ADDIS_HI (11, 11, -data_words);
 	  tramp[1] = OPCODE_ADDI (11, 11, -data_words);

 	  /* Multiply index of entry by 3 (in r11).  */
 	  tramp[2] = OPCODE_SLWI (12, 11, 1);
 	  tramp[3] = OPCODE_ADD (11, 12, 11);
 	  if (dlrr <= 0x01fffffc || dlrr >= 0xfe000000)
 	    {
 	      /* Load address of link map in r12.  */
 	      tramp[4] = OPCODE_LI (12, (Elf32_Word) map);
 	      tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

 	      /* Call _dl_runtime_resolve.  */
 	      tramp[6] = OPCODE_BA (dlrr);
 	    }
 	  else
 	    {
 	      /* Get address of _dl_runtime_resolve in CTR.  */
 	      tramp[4] = OPCODE_LI (12, dlrr);
 	      tramp[5] = OPCODE_ADDIS_HI (12, 12, dlrr);
 	      tramp[6] = OPCODE_MTCTR (12);

 	      /* Load address of link map in r12.  */
 	      tramp[7] = OPCODE_LI (12, (Elf32_Word) map);
 	      tramp[8] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

 	      /* Call _dl_runtime_resolve.  */
 	      tramp[9] = OPCODE_BCTR ();
 	    }

 	  /* Set up the lazy PLT entries.  */
 	  offset = PLT_INITIAL_ENTRY_WORDS;
 	  i = 0;
 	  while (i < num_plt_entries && i < PLT_DOUBLE_SIZE)
 	    {
 	      plt[offset  ] = OPCODE_LI (11, i * 4);
 	      plt[offset+1] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS + 2
 					 - (offset+1))
 					* 4);
 	      i++;
 	      offset += 2;
 	    }
 	  while (i < num_plt_entries)
 	    {
 	      plt[offset  ] = OPCODE_LIS_HI (11, i * 4 + data_words);
 	      plt[offset+1] = OPCODE_LWZU (12, i * 4 + data_words, 11);
 	      plt[offset+2] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS
 					 - (offset+2))
 					* 4);
 	      plt[offset+3] = OPCODE_BCTR ();
 	      i++;
 	      offset += 4;
 	    }
 	}

       /* Now, we've modified code.  We need to write the changes from
 	 the data cache to a second-level unified cache, then make
 	 sure that stale data in the instruction cache is removed.
 	 (In a multiprocessor system, the effect is more complex.)
 	 Most of the PLT shouldn't be in the instruction cache, but
 	 there may be a little overlap at the start and the end.

 	 Assumes that dcbst and icbi apply to lines of 16 bytes or
 	 more.  Current known line sizes are 16, 32, and 128 bytes.
 	 The following gets the __cache_line_size, when available.  */

       /* Default minimum 4 words per cache line.  */
       int line_size_words = 4;

       if (lazy && __cache_line_size != 0)
 	/* Convert bytes to words.  */
 	line_size_words = __cache_line_size / 4;

       size_modified = lazy ? rel_offset_words : 6;
       for (i = 0; i < size_modified; i += line_size_words)
         PPC_DCBST (plt + i);
       PPC_DCBST (plt + size_modified - 1);
       PPC_SYNC;

       for (i = 0; i < size_modified; i += line_size_words)
         PPC_ICBI (plt + i);
       PPC_ICBI (plt + size_modified - 1);
       PPC_ISYNC;
     }

   return lazy;
 }

 Elf32_Addr
 __elf_machine_fixup_plt (struct link_map *map,
 			 Elf32_Addr *reloc_addr, Elf32_Addr finaladdr)
 {
   Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
   if (delta << 6 >> 6 == delta)
     *reloc_addr = OPCODE_B (delta);
   else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
     *reloc_addr = OPCODE_BA (finaladdr);
   else
     {
       Elf32_Word *plt, *data_words;
       Elf32_Word index, offset, num_plt_entries;

       num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
 			 / sizeof(Elf32_Rela));
       plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
       offset = reloc_addr - plt;
       index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
       data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);

       reloc_addr += 1;

       if (index < PLT_DOUBLE_SIZE)
 	{
 	  data_words[index] = finaladdr;
 	  PPC_SYNC;
 	  *reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1))
 				  * 4);
 	}
       else
 	{
 	  index -= (index - PLT_DOUBLE_SIZE)/2;

 	  data_words[index] = finaladdr;
 	  PPC_SYNC;

 	  reloc_addr[1] = OPCODE_MTCTR (12);
 	  MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
 	  PPC_SYNC;

 	  reloc_addr[0] = OPCODE_LWZ (12,
 				      (Elf32_Word) (data_words + index), 11);
 	}
     }
   MODIFIED_CODE (reloc_addr);
   return finaladdr;
 }

 void
 _dl_reloc_overflow (struct link_map *map,
 		    const char *name,
 		    Elf32_Addr *const reloc_addr,
 		    const Elf32_Sym *refsym)
 {
   char buffer[128];
   char *t;
   t = stpcpy (buffer, name);
   t = stpcpy (t, " relocation at 0x00000000");
   _itoa_word ((unsigned) reloc_addr, t, 16, 0);
   if (refsym)
     {
       const char *strtab;

       strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
       t = stpcpy (t, " for symbol `");
       t = stpcpy (t, strtab + refsym->st_name);
       t = stpcpy (t, "'");
     }
   t = stpcpy (t, " out of range");
   _dl_signal_error (0, map->l_name, NULL, buffer);
 }

 void
 __process_machine_rela (struct link_map *map,
 			const Elf32_Rela *reloc,
 			struct link_map *sym_map,
 			const Elf32_Sym *sym,
 			const Elf32_Sym *refsym,
 			Elf32_Addr *const reloc_addr,
 			Elf32_Addr const finaladdr,
 			int rinfo)
 {
   switch (rinfo)
     {
     case R_PPC_NONE:
       return;

     case R_PPC_ADDR32:
     case R_PPC_GLOB_DAT:
     case R_PPC_RELATIVE:
       *reloc_addr = finaladdr;
       return;

     case R_PPC_IRELATIVE:
       *reloc_addr = ((Elf32_Addr (*) (void)) finaladdr) ();
       return;

     case R_PPC_UADDR32:
       ((char *) reloc_addr)[0] = finaladdr >> 24;
       ((char *) reloc_addr)[1] = finaladdr >> 16;
       ((char *) reloc_addr)[2] = finaladdr >> 8;
       ((char *) reloc_addr)[3] = finaladdr;
       break;

     case R_PPC_ADDR24:
       if (__builtin_expect (finaladdr > 0x01fffffc && finaladdr < 0xfe000000, 0))
 	_dl_reloc_overflow (map,  "R_PPC_ADDR24", reloc_addr, refsym);
       *reloc_addr = (*reloc_addr & 0xfc000003) | (finaladdr & 0x3fffffc);
       break;

     case R_PPC_ADDR16:
       if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
 	_dl_reloc_overflow (map,  "R_PPC_ADDR16", reloc_addr, refsym);
       *(Elf32_Half*) reloc_addr = finaladdr;
       break;

     case R_PPC_UADDR16:
       if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
 	_dl_reloc_overflow (map,  "R_PPC_UADDR16", reloc_addr, refsym);
       ((char *) reloc_addr)[0] = finaladdr >> 8;
       ((char *) reloc_addr)[1] = finaladdr;
       break;

     case R_PPC_ADDR16_LO:
       *(Elf32_Half*) reloc_addr = finaladdr;
       break;

     case R_PPC_ADDR16_HI:
       *(Elf32_Half*) reloc_addr = finaladdr >> 16;
       break;

     case R_PPC_ADDR16_HA:
       *(Elf32_Half*) reloc_addr = (finaladdr + 0x8000) >> 16;
       break;

     case R_PPC_ADDR14:
     case R_PPC_ADDR14_BRTAKEN:
     case R_PPC_ADDR14_BRNTAKEN:
       if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
 	_dl_reloc_overflow (map,  "R_PPC_ADDR14", reloc_addr, refsym);
       *reloc_addr = (*reloc_addr & 0xffff0003) | (finaladdr & 0xfffc);
       if (rinfo != R_PPC_ADDR14)
 	*reloc_addr = ((*reloc_addr & 0xffdfffff)
 		       | ((rinfo == R_PPC_ADDR14_BRTAKEN)
 			  ^ (finaladdr >> 31)) << 21);
       break;

     case R_PPC_REL24:
       {
 	Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
 	if (delta << 6 >> 6 != delta)
 	  _dl_reloc_overflow (map,  "R_PPC_REL24", reloc_addr, refsym);
 	*reloc_addr = (*reloc_addr & 0xfc000003) | (delta & 0x3fffffc);
       }
       break;

     case R_PPC_COPY:
       if (sym == NULL)
 	/* This can happen in trace mode when an object could not be
 	   found.  */
 	return;
       if (sym->st_size > refsym->st_size
 	  || (GLRO(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, (char *) finaladdr, MIN (sym->st_size,
 						   refsym->st_size));
       return;

     case R_PPC_REL32:
       *reloc_addr = finaladdr - (Elf32_Word) reloc_addr;
       return;

     case R_PPC_JMP_SLOT:
       /* It used to be that elf_machine_fixup_plt was used here,
 	 but that doesn't work when ld.so relocates itself
 	 for the second time.  On the bright side, there's
          no need to worry about thread-safety here.  */
       {
 	Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
 	if (delta << 6 >> 6 == delta)
 	  *reloc_addr = OPCODE_B (delta);
 	else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
 	  *reloc_addr = OPCODE_BA (finaladdr);
 	else
 	  {
 	    Elf32_Word *plt, *data_words;
 	    Elf32_Word index, offset, num_plt_entries;

 	    plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
 	    offset = reloc_addr - plt;

 	    if (offset < PLT_DOUBLE_SIZE*2 + PLT_INITIAL_ENTRY_WORDS)
 	      {
 		index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
 		num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
 				   / sizeof(Elf32_Rela));
 		data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);
 		data_words[index] = finaladdr;
 		reloc_addr[0] = OPCODE_LI (11, index * 4);
 		reloc_addr[1] = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS
 					   - (offset+1))
 					  * 4);
 		MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
 	      }
 	    else
 	      {
 		reloc_addr[0] = OPCODE_LIS_HI (12, finaladdr);
 		reloc_addr[1] = OPCODE_ADDI (12, 12, finaladdr);
 		reloc_addr[2] = OPCODE_MTCTR (12);
 		reloc_addr[3] = OPCODE_BCTR ();
 		MODIFIED_CODE_NOQUEUE (reloc_addr + 3);
 	      }
 	  }
       }
       break;

 #define DO_TLS_RELOC(suffix)						      \
     case R_PPC_DTPREL##suffix:						      \
       /* During relocation all TLS symbols are defined and used.	      \
 	 Therefore the offset is already correct.  */			      \
       if (sym_map != NULL)						      \
 	do_reloc##suffix ("R_PPC_DTPREL"#suffix,			      \
 			  TLS_DTPREL_VALUE (sym, reloc));		      \
       break;								      \
     case R_PPC_TPREL##suffix:						      \
       if (sym_map != NULL)						      \
 	{								      \
 	  CHECK_STATIC_TLS (map, sym_map);				      \
 	  do_reloc##suffix ("R_PPC_TPREL"#suffix,			      \
 			    TLS_TPREL_VALUE (sym_map, sym, reloc));	      \
 	}								      \
       break;

     inline void do_reloc16 (const char *r_name, Elf32_Addr value)
       {
 	if (__builtin_expect (value > 0x7fff && value < 0xffff8000, 0))
 	  _dl_reloc_overflow (map, r_name, reloc_addr, refsym);
 	*(Elf32_Half *) reloc_addr = value;
       }
     inline void do_reloc16_LO (const char *r_name, Elf32_Addr value)
       {
 	*(Elf32_Half *) reloc_addr = value;
       }
     inline void do_reloc16_HI (const char *r_name, Elf32_Addr value)
       {
 	*(Elf32_Half *) reloc_addr = value >> 16;
       }
     inline void do_reloc16_HA (const char *r_name, Elf32_Addr value)
       {
 	*(Elf32_Half *) reloc_addr = (value + 0x8000) >> 16;
       }
     DO_TLS_RELOC (16)
     DO_TLS_RELOC (16_LO)
     DO_TLS_RELOC (16_HI)
     DO_TLS_RELOC (16_HA)

     default:
       _dl_reloc_bad_type (map, rinfo, 0);
       return;
     }

   MODIFIED_CODE_NOQUEUE (reloc_addr);
 }
	/* Machine-dependent ELF dynamic relocation functions. PowerPC version.
	Copyright (C) 1995-2006, 2008 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. */

	#include <unistd.h>
	#include <string.h>
	#include <sys/param.h>
	#include <link.h>
	#include <ldsodefs.h>
	#include <elf/dynamic-link.h>
	#include <dl-machine.h>
	#include <stdio-common/_itoa.h>

	/* The value __cache_line_size is defined in dl-sysdep.c and is initialised
	by _dl_sysdep_start via DL_PLATFORM_INIT. */
	extern int __cache_line_size attribute_hidden;

	/* Because ld.so is now versioned, these functions can be in their own file;
	no relocations need to be done to call them.
	Of course, if ld.so is not versioned... */
	#if defined SHARED && !(DO_VERSIONING - 0)
	#error This will not work with versioning turned off, sorry.
	#endif


	/* Stuff for the PLT. */
	#define PLT_INITIAL_ENTRY_WORDS 18
	#define PLT_LONGBRANCH_ENTRY_WORDS 0
	#define PLT_TRAMPOLINE_ENTRY_WORDS 6
	#define PLT_DOUBLE_SIZE (1<<13)
	#define PLT_ENTRY_START_WORDS(entry_number) \
	(PLT_INITIAL_ENTRY_WORDS + (entry_number)*2 \
	+ ((entry_number) > PLT_DOUBLE_SIZE \
	? ((entry_number) - PLT_DOUBLE_SIZE)*2 \
	: 0))
	#define PLT_DATA_START_WORDS(num_entries) PLT_ENTRY_START_WORDS(num_entries)

	/* Macros to build PowerPC opcode words. */
	#define OPCODE_ADDI(rd,ra,simm) \
	(0x38000000 \| (rd) << 21 \| (ra) << 16 \| ((simm) & 0xffff))
	#define OPCODE_ADDIS(rd,ra,simm) \
	(0x3c000000 \| (rd) << 21 \| (ra) << 16 \| ((simm) & 0xffff))
	#define OPCODE_ADD(rd,ra,rb) \
	(0x7c000214 \| (rd) << 21 \| (ra) << 16 \| (rb) << 11)
	#define OPCODE_B(target) (0x48000000 \| ((target) & 0x03fffffc))
	#define OPCODE_BA(target) (0x48000002 \| ((target) & 0x03fffffc))
	#define OPCODE_BCTR() 0x4e800420
	#define OPCODE_LWZ(rd,d,ra) \
	(0x80000000 \| (rd) << 21 \| (ra) << 16 \| ((d) & 0xffff))
	#define OPCODE_LWZU(rd,d,ra) \
	(0x84000000 \| (rd) << 21 \| (ra) << 16 \| ((d) & 0xffff))
	#define OPCODE_MTCTR(rd) (0x7C0903A6 \| (rd) << 21)
	#define OPCODE_RLWINM(ra,rs,sh,mb,me) \
	(0x54000000 \| (rs) << 21 \| (ra) << 16 \| (sh) << 11 \| (mb) << 6 \| (me) << 1)

	#define OPCODE_LI(rd,simm) OPCODE_ADDI(rd,0,simm)
	#define OPCODE_ADDIS_HI(rd,ra,value) \
	OPCODE_ADDIS(rd,ra,((value) + 0x8000) >> 16)
	#define OPCODE_LIS_HI(rd,value) OPCODE_ADDIS_HI(rd,0,value)
	#define OPCODE_SLWI(ra,rs,sh) OPCODE_RLWINM(ra,rs,sh,0,31-sh)


	#define PPC_DCBST(where) asm volatile ("dcbst 0,%0" : : "r"(where) : "memory")
	#define PPC_SYNC asm volatile ("sync" : : : "memory")
	#define PPC_ISYNC asm volatile ("sync; isync" : : : "memory")
	#define PPC_ICBI(where) asm volatile ("icbi 0,%0" : : "r"(where) : "memory")
	#define PPC_DIE asm volatile ("tweq 0,0")

	/* Use this when you've modified some code, but it won't be in the
	instruction fetch queue (or when it doesn't matter if it is). */
	#define MODIFIED_CODE_NOQUEUE(where) \
	do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); } while (0)
	/* Use this when it might be in the instruction queue. */
	#define MODIFIED_CODE(where) \
	do { PPC_DCBST(where); PPC_SYNC; PPC_ICBI(where); PPC_ISYNC; } while (0)


	/* The idea here is that to conform to the ABI, we are supposed to try
	to load dynamic objects between 0x10000 (we actually use 0x40000 as
	the lower bound, to increase the chance of a memory reference from
	a null pointer giving a segfault) and the program's load address;
	this may allow us to use a branch instruction in the PLT rather
	than a computed jump. The address is only used as a preference for
	mmap, so if we get it wrong the worst that happens is that it gets
	mapped somewhere else. */

	ElfW(Addr)
	__elf_preferred_address (struct link_map *loader, size_t maplength,
	ElfW(Addr) mapstartpref)
	{
	ElfW(Addr) low, high;
	struct link_map *l;
	Lmid_t nsid;

	/* If the object has a preference, load it there! */
	if (mapstartpref != 0)
	return mapstartpref;

	/* Otherwise, quickly look for a suitable gap between 0x3FFFF and
	0x70000000. 0x3FFFF is so that references off NULL pointers will
	cause a segfault, 0x70000000 is just paranoia (it should always
	be superceded by the program's load address). */
	low = 0x0003FFFF;
	high = 0x70000000;
	for (nsid = 0; nsid < DL_NNS; ++nsid)
	for (l = GL(dl_ns)[nsid]._ns_loaded; l; l = l->l_next)
	{
	ElfW(Addr) mapstart, mapend;
	mapstart = l->l_map_start & ~(GLRO(dl_pagesize) - 1);
	mapend = l->l_map_end \| (GLRO(dl_pagesize) - 1);
	assert (mapend > mapstart);

	/* Prefer gaps below the main executable, note that l ==
	_dl_loaded does not work for static binaries loading
	e.g. libnss_.so. /
	if ((mapend >= high \|\| l->l_type == lt_executable)
	&& high >= mapstart)
	high = mapstart;
	else if (mapend >= low && low >= mapstart)
	low = mapend;
	else if (high >= mapend && mapstart >= low)
	{
	if (high - mapend >= mapstart - low)
	low = mapend;
	else
	high = mapstart;
	}
	}

	high -= 0x10000; /* Allow some room between objects. */
	maplength = (maplength \| (GLRO(dl_pagesize) - 1)) + 1;
	if (high <= low \|\| high - low < maplength )
	return 0;
	return high - maplength; /* Both high and maplength are page-aligned. */
	}

	/* 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.
	Also install a small trampoline to be used by entries that have
	been relocated to an address too far away for a single branch. */

	/* There are many kinds of PLT entries:

	(1) A direct jump to the actual routine, either a relative or
	absolute branch. These are set up in __elf_machine_fixup_plt.

	(2) Short lazy entries. These cover the first 8192 slots in
	the PLT, and look like (where 'index' goes from 0 to 8191):

	li %r11, index*4
	b &plt[PLT_TRAMPOLINE_ENTRY_WORDS+1]

	(3) Short indirect jumps. These replace (2) when a direct jump
	wouldn't reach. They look the same except that the branch
	is 'b &plt[PLT_LONGBRANCH_ENTRY_WORDS]'.

	(4) Long lazy entries. These cover the slots when a short entry
	won't fit ('index*4' overflows its field), and look like:

	lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS])
	lwzu %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS])
	b &plt[PLT_TRAMPOLINE_ENTRY_WORDS]
	bctr

	(5) Long indirect jumps. These replace (4) when a direct jump
	wouldn't reach. They look like:

	lis %r11, %hi(index*4 + &plt[PLT_DATA_START_WORDS])
	lwz %r12, %r11, %lo(index*4 + &plt[PLT_DATA_START_WORDS])
	mtctr %r12
	bctr

	(6) Long direct jumps. These are used when thread-safety is not
	required. They look like:

	lis %r12, %hi(finaladdr)
	addi %r12, %r12, %lo(finaladdr)
	mtctr %r12
	bctr


	The lazy entries, (2) and (4), are set up here in
	__elf_machine_runtime_setup. (1), (3), and (5) are set up in
	__elf_machine_fixup_plt. (1), (3), and (6) can also be constructed
	in __process_machine_rela.

	The reason for the somewhat strange construction of the long
	entries, (4) and (5), is that we need to ensure thread-safety. For
	(1) and (3), this is obvious because only one instruction is
	changed and the PPC architecture guarantees that aligned stores are
	atomic. For (5), this is more tricky. When changing (4) to (5),
	the `b' instruction is first changed to to `mtctr'; this is safe
	and is why the `lwzu' instruction is not just a simple `addi'.
	Once this is done, and is visible to all processors, the `lwzu' can
	safely be changed to a `lwz'. */
	int
	__elf_machine_runtime_setup (struct link_map *map, int lazy, int profile)
	{
	if (map->l_info[DT_JMPREL])
	{
	Elf32_Word i;
	Elf32_Word plt = (Elf32_Word ) D_PTR (map, l_info[DT_PLTGOT]);
	Elf32_Word num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
	/ sizeof (Elf32_Rela));
	Elf32_Word rel_offset_words = PLT_DATA_START_WORDS (num_plt_entries);
	Elf32_Word data_words = (Elf32_Word) (plt + rel_offset_words);
	Elf32_Word size_modified;

	extern void _dl_runtime_resolve (void);
	extern void _dl_prof_resolve (void);

	/* Convert the index in r11 into an actual address, and get the
	word at that address. */
	plt[PLT_LONGBRANCH_ENTRY_WORDS] = OPCODE_ADDIS_HI (11, 11, data_words);
	plt[PLT_LONGBRANCH_ENTRY_WORDS + 1] = OPCODE_LWZ (11, data_words, 11);

	/* Call the procedure at that address. */
	plt[PLT_LONGBRANCH_ENTRY_WORDS + 2] = OPCODE_MTCTR (11);
	plt[PLT_LONGBRANCH_ENTRY_WORDS + 3] = OPCODE_BCTR ();

	if (lazy)
	{
	Elf32_Word *tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS;
	Elf32_Word dlrr = (Elf32_Word)(profile
	? _dl_prof_resolve
	: _dl_runtime_resolve);
	Elf32_Word offset;

	if (profile && GLRO(dl_profile) != NULL
	&& _dl_name_match_p (GLRO(dl_profile), map))
	/* This is the object we are looking for. Say that we really
	want profiling and the timers are started. */
	GL(dl_profile_map) = map;

	/* For the long entries, subtract off data_words. */
	tramp[0] = OPCODE_ADDIS_HI (11, 11, -data_words);
	tramp[1] = OPCODE_ADDI (11, 11, -data_words);

	/* Multiply index of entry by 3 (in r11). */
	tramp[2] = OPCODE_SLWI (12, 11, 1);
	tramp[3] = OPCODE_ADD (11, 12, 11);
	if (dlrr <= 0x01fffffc \|\| dlrr >= 0xfe000000)
	{
	/* Load address of link map in r12. */
	tramp[4] = OPCODE_LI (12, (Elf32_Word) map);
	tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

	/* Call _dl_runtime_resolve. */
	tramp[6] = OPCODE_BA (dlrr);
	}
	else
	{
	/* Get address of _dl_runtime_resolve in CTR. */
	tramp[4] = OPCODE_LI (12, dlrr);
	tramp[5] = OPCODE_ADDIS_HI (12, 12, dlrr);
	tramp[6] = OPCODE_MTCTR (12);

	/* Load address of link map in r12. */
	tramp[7] = OPCODE_LI (12, (Elf32_Word) map);
	tramp[8] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) map);

	/* Call _dl_runtime_resolve. */
	tramp[9] = OPCODE_BCTR ();
	}

	/* Set up the lazy PLT entries. */
	offset = PLT_INITIAL_ENTRY_WORDS;
	i = 0;
	while (i < num_plt_entries && i < PLT_DOUBLE_SIZE)
	{
	plt[offset ] = OPCODE_LI (11, i * 4);
	plt[offset+1] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS + 2
	- (offset+1))
	* 4);
	i++;
	offset += 2;
	}
	while (i < num_plt_entries)
	{
	plt[offset ] = OPCODE_LIS_HI (11, i * 4 + data_words);
	plt[offset+1] = OPCODE_LWZU (12, i * 4 + data_words, 11);
	plt[offset+2] = OPCODE_B ((PLT_TRAMPOLINE_ENTRY_WORDS
	- (offset+2))
	* 4);
	plt[offset+3] = OPCODE_BCTR ();
	i++;
	offset += 4;
	}
	}

	/* Now, we've modified code. We need to write the changes from
	the data cache to a second-level unified cache, then make
	sure that stale data in the instruction cache is removed.
	(In a multiprocessor system, the effect is more complex.)
	Most of the PLT shouldn't be in the instruction cache, but
	there may be a little overlap at the start and the end.

	Assumes that dcbst and icbi apply to lines of 16 bytes or
	more. Current known line sizes are 16, 32, and 128 bytes.
	The following gets the __cache_line_size, when available. */

	/* Default minimum 4 words per cache line. */
	int line_size_words = 4;

	if (lazy && __cache_line_size != 0)
	/* Convert bytes to words. */
	line_size_words = __cache_line_size / 4;

	size_modified = lazy ? rel_offset_words : 6;
	for (i = 0; i < size_modified; i += line_size_words)
	PPC_DCBST (plt + i);
	PPC_DCBST (plt + size_modified - 1);
	PPC_SYNC;

	for (i = 0; i < size_modified; i += line_size_words)
	PPC_ICBI (plt + i);
	PPC_ICBI (plt + size_modified - 1);
	PPC_ISYNC;
	}

	return lazy;
	}

	Elf32_Addr
	__elf_machine_fixup_plt (struct link_map *map,
	Elf32_Addr *reloc_addr, Elf32_Addr finaladdr)
	{
	Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
	if (delta << 6 >> 6 == delta)
	*reloc_addr = OPCODE_B (delta);
	else if (finaladdr <= 0x01fffffc \|\| finaladdr >= 0xfe000000)
	*reloc_addr = OPCODE_BA (finaladdr);
	else
	{
	Elf32_Word plt, data_words;
	Elf32_Word index, offset, num_plt_entries;

	num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
	/ sizeof(Elf32_Rela));
	plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
	offset = reloc_addr - plt;
	index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
	data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);

	reloc_addr += 1;

	if (index < PLT_DOUBLE_SIZE)
	{
	data_words[index] = finaladdr;
	PPC_SYNC;
	*reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1))
	* 4);
	}
	else
	{
	index -= (index - PLT_DOUBLE_SIZE)/2;

	data_words[index] = finaladdr;
	PPC_SYNC;

	reloc_addr[1] = OPCODE_MTCTR (12);
	MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
	PPC_SYNC;

	reloc_addr[0] = OPCODE_LWZ (12,
	(Elf32_Word) (data_words + index), 11);
	}
	}
	MODIFIED_CODE (reloc_addr);
	return finaladdr;
	}

	void
	_dl_reloc_overflow (struct link_map *map,
	const char *name,
	Elf32_Addr *const reloc_addr,
	const Elf32_Sym *refsym)
	{
	char buffer[128];
	char *t;
	t = stpcpy (buffer, name);
	t = stpcpy (t, " relocation at 0x00000000");
	_itoa_word ((unsigned) reloc_addr, t, 16, 0);
	if (refsym)
	{
	const char *strtab;

	strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
	t = stpcpy (t, " for symbol `");
	t = stpcpy (t, strtab + refsym->st_name);
	t = stpcpy (t, "'");
	}
	t = stpcpy (t, " out of range");
	_dl_signal_error (0, map->l_name, NULL, buffer);
	}

	void
	__process_machine_rela (struct link_map *map,
	const Elf32_Rela *reloc,
	struct link_map *sym_map,
	const Elf32_Sym *sym,
	const Elf32_Sym *refsym,
	Elf32_Addr *const reloc_addr,
	Elf32_Addr const finaladdr,
	int rinfo)
	{
	switch (rinfo)
	{
	case R_PPC_NONE:
	return;

	case R_PPC_ADDR32:
	case R_PPC_GLOB_DAT:
	case R_PPC_RELATIVE:
	*reloc_addr = finaladdr;
	return;

	case R_PPC_IRELATIVE:
	reloc_addr = ((Elf32_Addr () (void)) finaladdr) ();
	return;

	case R_PPC_UADDR32:
	((char *) reloc_addr)[0] = finaladdr >> 24;
	((char *) reloc_addr)[1] = finaladdr >> 16;
	((char *) reloc_addr)[2] = finaladdr >> 8;
	((char *) reloc_addr)[3] = finaladdr;
	break;

	case R_PPC_ADDR24:
	if (__builtin_expect (finaladdr > 0x01fffffc && finaladdr < 0xfe000000, 0))
	_dl_reloc_overflow (map, "R_PPC_ADDR24", reloc_addr, refsym);
	reloc_addr = (reloc_addr & 0xfc000003) \| (finaladdr & 0x3fffffc);
	break;

	case R_PPC_ADDR16:
	if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
	_dl_reloc_overflow (map, "R_PPC_ADDR16", reloc_addr, refsym);
	(Elf32_Half) reloc_addr = finaladdr;
	break;

	case R_PPC_UADDR16:
	if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
	_dl_reloc_overflow (map, "R_PPC_UADDR16", reloc_addr, refsym);
	((char *) reloc_addr)[0] = finaladdr >> 8;
	((char *) reloc_addr)[1] = finaladdr;
	break;

	case R_PPC_ADDR16_LO:
	(Elf32_Half) reloc_addr = finaladdr;
	break;

	case R_PPC_ADDR16_HI:
	(Elf32_Half) reloc_addr = finaladdr >> 16;
	break;

	case R_PPC_ADDR16_HA:
	(Elf32_Half) reloc_addr = (finaladdr + 0x8000) >> 16;
	break;

	case R_PPC_ADDR14:
	case R_PPC_ADDR14_BRTAKEN:
	case R_PPC_ADDR14_BRNTAKEN:
	if (__builtin_expect (finaladdr > 0x7fff && finaladdr < 0xffff8000, 0))
	_dl_reloc_overflow (map, "R_PPC_ADDR14", reloc_addr, refsym);
	reloc_addr = (reloc_addr & 0xffff0003) \| (finaladdr & 0xfffc);
	if (rinfo != R_PPC_ADDR14)
	reloc_addr = ((reloc_addr & 0xffdfffff)
	\| ((rinfo == R_PPC_ADDR14_BRTAKEN)
	^ (finaladdr >> 31)) << 21);
	break;

	case R_PPC_REL24:
	{
	Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
	if (delta << 6 >> 6 != delta)
	_dl_reloc_overflow (map, "R_PPC_REL24", reloc_addr, refsym);
	reloc_addr = (reloc_addr & 0xfc000003) \| (delta & 0x3fffffc);
	}
	break;

	case R_PPC_COPY:
	if (sym == NULL)
	/* This can happen in trace mode when an object could not be
	found. */
	return;
	if (sym->st_size > refsym->st_size
	\|\| (GLRO(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, (char *) finaladdr, MIN (sym->st_size,
	refsym->st_size));
	return;

	case R_PPC_REL32:
	*reloc_addr = finaladdr - (Elf32_Word) reloc_addr;
	return;

	case R_PPC_JMP_SLOT:
	/* It used to be that elf_machine_fixup_plt was used here,
	but that doesn't work when ld.so relocates itself
	for the second time. On the bright side, there's
	no need to worry about thread-safety here. */
	{
	Elf32_Sword delta = finaladdr - (Elf32_Word) reloc_addr;
	if (delta << 6 >> 6 == delta)
	*reloc_addr = OPCODE_B (delta);
	else if (finaladdr <= 0x01fffffc \|\| finaladdr >= 0xfe000000)
	*reloc_addr = OPCODE_BA (finaladdr);
	else
	{
	Elf32_Word plt, data_words;
	Elf32_Word index, offset, num_plt_entries;

	plt = (Elf32_Word *) D_PTR (map, l_info[DT_PLTGOT]);
	offset = reloc_addr - plt;

	if (offset < PLT_DOUBLE_SIZE*2 + PLT_INITIAL_ENTRY_WORDS)
	{
	index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
	num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
	/ sizeof(Elf32_Rela));
	data_words = plt + PLT_DATA_START_WORDS (num_plt_entries);
	data_words[index] = finaladdr;
	reloc_addr[0] = OPCODE_LI (11, index * 4);
	reloc_addr[1] = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS
	- (offset+1))
	* 4);
	MODIFIED_CODE_NOQUEUE (reloc_addr + 1);
	}
	else
	{
	reloc_addr[0] = OPCODE_LIS_HI (12, finaladdr);
	reloc_addr[1] = OPCODE_ADDI (12, 12, finaladdr);
	reloc_addr[2] = OPCODE_MTCTR (12);
	reloc_addr[3] = OPCODE_BCTR ();
	MODIFIED_CODE_NOQUEUE (reloc_addr + 3);
	}
	}
	}
	break;

	#define DO_TLS_RELOC(suffix) \
	case R_PPC_DTPREL##suffix: \
	/* During relocation all TLS symbols are defined and used. \
	Therefore the offset is already correct. */ \
	if (sym_map != NULL) \
	do_reloc##suffix ("R_PPC_DTPREL"#suffix, \
	TLS_DTPREL_VALUE (sym, reloc)); \
	break; \
	case R_PPC_TPREL##suffix: \
	if (sym_map != NULL) \
	{ \
	CHECK_STATIC_TLS (map, sym_map); \
	do_reloc##suffix ("R_PPC_TPREL"#suffix, \
	TLS_TPREL_VALUE (sym_map, sym, reloc)); \
	} \
	break;

	inline void do_reloc16 (const char *r_name, Elf32_Addr value)
	{
	if (__builtin_expect (value > 0x7fff && value < 0xffff8000, 0))
	_dl_reloc_overflow (map, r_name, reloc_addr, refsym);
	(Elf32_Half ) reloc_addr = value;
	}
	inline void do_reloc16_LO (const char *r_name, Elf32_Addr value)
	{
	(Elf32_Half ) reloc_addr = value;
	}
	inline void do_reloc16_HI (const char *r_name, Elf32_Addr value)
	{
	(Elf32_Half ) reloc_addr = value >> 16;
	}
	inline void do_reloc16_HA (const char *r_name, Elf32_Addr value)
	{
	(Elf32_Half ) reloc_addr = (value + 0x8000) >> 16;
	}
	DO_TLS_RELOC (16)
	DO_TLS_RELOC (16_LO)
	DO_TLS_RELOC (16_HI)
	DO_TLS_RELOC (16_HA)

	default:
	_dl_reloc_bad_type (map, rinfo, 0);
	return;
	}

	MODIFIED_CODE_NOQUEUE (reloc_addr);
	}