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

   1 /*      $NetBSD: md-static-funcs.c,v 1.3 1998/01/05 22:00:45 cgd Exp $  */
   2
   3 /*
   4  * Simple SPARC relocations for the benefit of self-relocation of ld.so
   5  * avoiding the use of global variables (ie. reloc_bitshift[] et. al.).
   6  * Only types supported are RELOC_32 and RELOC_RELATIVE.
   7  *
   8  * This *must* be a static function, so it is not called through a jmpslot.
   9  */
  10 static void
  11 md_relocate_simple(r, relocation, addr)
  12         struct relocation_info  *r;
  13         long                    relocation;
  14         char                    *addr;
  15 {
  16         unsigned long   mask;
  17         unsigned long   shift;
  18
  19         switch (r->r_type) {
  20         case RELOC_32:
  21                 mask = 0xffffffff;
  22                 shift = 0;
  23                 break;
  24         case RELOC_RELATIVE:
  25                 mask = 0x003fffff;
  26                 shift = 10;
  27                 break;
  28         default:
  29                 return;
  30         }
  31         relocation += (*(long *)addr & mask) << shift;
  32         relocation >>= shift;
  33         relocation &= mask;
  34
  35         *(long *) (addr) &= ~mask;
  36         *(long *) (addr) |= relocation;
  37 }
  38