gdb/testsuite/gdb.base/savedregs.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2004-2021 Free Software Foundation, Inc.
   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 */
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <signal.h>
  23 #include <sys/time.h>
  24
  25 static volatile int done;
  26
  27 extern int
  28 callee (int param)
  29 {
  30   return param * done + 1;
  31 }
  32
  33 extern int
  34 caller (int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8)
  35 {
  36   return callee ((a1 << a2 * a3 / a4) + a6 & a6 % a7 - a8) + done;
  37 }
  38
  39 static void
  40 catcher (int sig)
  41 {
  42   done = 1;
  43 } /* handler */
  44
  45 static void
  46 thrower (void)
  47 {
  48   /* Trigger a SIGSEGV.  */
  49   *(volatile char *)0 = 0;
  50
  51   /* On MMU-less system, previous memory access to address zero doesn't
  52      trigger a SIGSEGV.  Trigger a SIGILL.  Each arch should define its
  53      own illegal instruction here.  */
  54
  55 #if defined(__arm__)
  56   asm(".word 0xf8f00000");
  57 #elif defined(__TMS320C6X__)
  58   asm(".word 0x56454313");
  59 #else
  60 #endif
  61
  62 }
  63
  64 int
  65 main ()
  66 {
  67   signal (SIGILL, catcher);
  68   signal (SIGSEGV, catcher);
  69   thrower ();
  70   return 0;
  71 }