gdb/testsuite/gdb.arch/s390-tdbregs.c

   1 /* Copyright 2008-2016 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19
  20 static void
  21 my_tbegin ()
  22 {
  23   __asm__ volatile
  24     ( "1:  .byte 0xe5,0x60,0x00,0x00,0xff,0x00\n"
  25       "    jnz 1b"
  26       : /* no return value */
  27       : /* no inputs */
  28       : "cc", "memory" );
  29 }
  30
  31 static void
  32 my_tend ()
  33 {
  34   __asm__ volatile
  35     ( "    .byte 0xb2,0xf8,0x00,0x00"
  36       : /* no return value */
  37       : /* no inputs */
  38       : "cc", "memory" );
  39 }
  40
  41 void
  42 try_transaction (void)
  43 {
  44   my_tbegin ();
  45   my_tend ();
  46 }
  47
  48 void
  49 crash_in_transaction (void)
  50 {
  51   volatile char *p = 0;
  52
  53   my_tbegin ();
  54   *p = 5;                       /* FAULT */
  55   my_tend ();
  56 }
  57
  58 int
  59 main (int argc, char *argv[])
  60 {
  61   try_transaction ();
  62   crash_in_transaction ();
  63   return 0;
  64 }