elf/tst-addr1.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 static int
   6 do_test (void)
   7 {
   8   Dl_info i;
   9   if (dladdr (&printf, &i) == 0)
  10     {
  11       puts ("not found");
  12       return 1;
  13     }
  14   printf ("found symbol %s in %s\n", i.dli_sname, i.dli_fname);
  15   if (i.dli_sname == NULL)
  16     return 1;
  17
  18 #if __LONG_DOUBLE_USES_FLOAT128 == 1
  19   /* On architectures which redirect long double to
  20      _Float128 (e.g powerpc64le), printf will resolve
  21      to __printfieee128 due to header redirects.  There
  22      is no _IO_printfieee128 alias.  */
  23   return strcmp (i.dli_sname, "__printfieee128") != 0;
  24 #else
  25   return i.dli_sname == NULL
  26          || (strcmp (i.dli_sname, "printf") != 0
  27              /* On architectures which create PIC code by default
  28                 &printf may resolve to an address in libc.so
  29                 rather than in the binary.  printf and _IO_printf
  30                 are aliased and which one comes first in the
  31                 hash table is up to the linker.  */
  32              && strcmp (i.dli_sname, "_IO_printf") != 0);
  33 #endif
  34 }
  35
  36 #include <support/test-driver.c>