libexec/ld.aout_so/arch/arm32/md-static-funcs.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 1997 Mark Brinicombe
   5  * Copyright (C) 1997 Causality Limited
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Causality Limited.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Called by ld.so when onanating.
  36  * This *must* be a static function, so it is not called through a jmpslot.
  37  */
  38
  39 #define RELOC_32        0x04
  40 #define RELOC_JMPSLOT   0x06    /* See note below */
  41 #define RELOC_GOT32     0x24
  42
  43 /*
  44  * The value is RELOC_JMPSLOT is special. Really it should be 0x46 i.e.
  45  * have the r_jmptable bit set however due to the usage of the
  46  * relocation bits outside the linker the r_jmptable is only used
  47  * internal to the linker and thus this bit get lost when the
  48  * relocations are written out.
  49  */
  50
  51 static void
  52 md_relocate_simple(r, relocation, addr)
  53         struct relocation_info  *r;
  54         long                    relocation;
  55         char                    *addr;
  56 {
  57         int index;
  58
  59         index = r->r_pcrel | (r->r_length << 1) | (r->r_extern << 3)
  60             | (r->r_neg << 4) | (r->r_baserel << 5);
  61
  62         if (index == RELOC_JMPSLOT)
  63                 *(long *)addr += relocation;
  64         else if (index == RELOC_GOT32)
  65                 *(long *)addr += relocation;
  66         else if (index == RELOC_32)
  67                 *(long *)addr += relocation;
  68
  69 /*      if (r->r_relative)
  70                 *(long *)addr += relocation;*/
  71 }