none/tests/s390x/ex_clone.c

   1 #include <features.h>
   2 #include <signal.h>
   3 #include <sys/types.h>
   4 #include <pthread.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9
  10 char source[40] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\0";
  11 char target[40] = "                                       \0";
  12
  13 pthread_t thread;
  14
  15 void *threadfunc(void *arg)
  16 {
  17         char buf2[40];
  18         int i;
  19
  20         memset(buf2, 0, sizeof(buf2));
  21         for (i=0; i<5000; i++)
  22                 asm volatile(
  23                         "lghi 2,0\n"
  24                         "lghi 3,0\n"
  25                         "lgr 4,%0\n"
  26                         "lgr 5,%1\n"
  27                         "larl 1,1f\n"
  28                         "0: ex 0,0(1)\n"
  29                         "j 2f\n"
  30                         "1: mvc 0(30,4),0(5)\n"
  31                         "2:\n"
  32                 ::"a" (buf2), "a" (source)
  33                 : "1", "2", "3", "4", "5", "memory");
  34         printf("%s\n", buf2);
  35         pthread_exit(0);
  36 }
  37
  38 int main()
  39 {
  40         int i;
  41
  42         pthread_create(&thread, NULL, threadfunc, NULL);
  43
  44         for (i=0; i<5000; i++)
  45                 asm volatile(
  46                         "lghi 4,0\n"
  47                         "lghi 5,0\n"
  48                         "lgr 2,%0\n"
  49                         "lgr 3,%1\n"
  50                         "larl 1,1f\n"
  51                         "0: ex 0,0(1)\n"
  52                         "j 2f\n"
  53                         "1: mvc 0(20,2),0(3)\n"
  54                         "2:\n"
  55                 ::"a" (target), "a" (source)
  56                 : "1", "2", "3", "4", "5", "memory");
  57         pthread_join(thread, NULL);
  58         printf("%s\n", target);
  59         pthread_exit(0);
  60 }