sysdeps/powerpc/tst-tlsopt-powerpc.c

   1 /* glibc test for __tls_get_addr optimization.  */
   2 #include <stdio.h>
   3
   4 #include "../../elf/tls-macros.h"
   5 #include "dl-tls.h"
   6
   7 /* common 'int' variable in TLS.  */
   8 COMMON_INT_DEF(foo);
   9
  10
  11 static int
  12 do_test (void)
  13 {
  14   int result = 0;
  15
  16   /* Get variable using general dynamic model.  */
  17   int *ap = TLS_GD (foo);
  18   if (*ap != 0)
  19     {
  20       printf ("foo = %d\n", *ap);
  21       result = 1;
  22     }
  23
  24   tls_index *tls_arg;
  25 #ifdef __powerpc64__
  26   register unsigned long thread_pointer __asm__ ("r13");
  27   asm ("addi %0,2,foo@got@tlsgd" : "=r" (tls_arg));
  28 #else
  29   register unsigned long thread_pointer __asm__ ("r2");
  30   asm ("bcl 20,31,1f\n1:\t"
  31        "mflr %0\n\t"
  32        "addis %0,%0,_GLOBAL_OFFSET_TABLE_-1b@ha\n\t"
  33        "addi %0,%0,_GLOBAL_OFFSET_TABLE_-1b@l\n\t"
  34        "addi %0,%0,foo@got@tlsgd" : "=b" (tls_arg));
  35 #endif
  36
  37   if (tls_arg->ti_module != 0)
  38     {
  39       printf ("tls_index not optimized, binutils too old?\n");
  40       result = 1;
  41     }
  42   else if (tls_arg->ti_offset + thread_pointer != (unsigned long) ap)
  43     {
  44       printf ("tls_index->ti_offset wrong value\n");
  45       result = 1;
  46     }
  47
  48   return result;
  49 }
  50
  51 #include <support/test-driver.c>