tests/tcg/aarch64/test-826.c

   1 #include <sys/mman.h>
   2 #include <unistd.h>
   3 #include <signal.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <assert.h>
   7
   8 static void *expected;
   9
  10 void sigsegv(int sig, siginfo_t *info, void *vuc)
  11 {
  12     ucontext_t *uc = vuc;
  13
  14     assert(info->si_addr == expected);
  15     uc->uc_mcontext.pc += 4;
  16 }
  17
  18 int main()
  19 {
  20     struct sigaction sa = {
  21         .sa_sigaction = sigsegv,
  22         .sa_flags = SA_SIGINFO
  23     };
  24
  25     void *page;
  26     long ofs;
  27
  28     if (sigaction(SIGSEGV, &sa, NULL) < 0) {
  29         perror("sigaction");
  30         return EXIT_FAILURE;
  31     }
  32
  33     page = mmap(0, getpagesize(), PROT_NONE, MAP_PRIVATE | MAP_ANON, -1, 0);
  34     if (page == MAP_FAILED) {
  35         perror("mmap");
  36         return EXIT_FAILURE;
  37     }
  38
  39     ofs = 0x124;
  40     expected = page + ofs;
  41
  42     asm("ptrue p0.d, vl1\n\t"
  43         "dup z0.d, %0\n\t"
  44         "ldnt1h {z1.d}, p0/z, [z0.d, %1]\n\t"
  45         "dup z1.d, %1\n\t"
  46         "ldnt1h {z0.d}, p0/z, [z1.d, %0]"
  47         : : "r"(page), "r"(ofs) : "v0", "v1");
  48
  49     return EXIT_SUCCESS;
  50 }