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authorJose Antonio Ortega Ruiz <jao@gnu.org>2003-01-12 21:05:01 +0000
committerJose Antonio Ortega Ruiz <jao@gnu.org>2003-01-12 21:05:01 +0000
commitfebce8be6f8365efe21f62d3276a45136318c518 (patch)
tree1dc6d3d81124763f7dcf3867e1ec50984e937290 /mixlib/xmix_vm.h
parent1f16b61e3c858e019042a41fafebf3520a3e0c9c (diff)
downloadmdk-febce8be6f8365efe21f62d3276a45136318c518.tar.gz
mdk-febce8be6f8365efe21f62d3276a45136318c518.tar.bz2
(inc_loc_): Stop program execution if the
program counter is incremented beyond the maximum address (3999).
Diffstat (limited to 'mixlib/xmix_vm.h')
-rw-r--r--mixlib/xmix_vm.h24
1 files changed, 12 insertions, 12 deletions
diff --git a/mixlib/xmix_vm.h b/mixlib/xmix_vm.h
index 019dfd6..45805e8 100644
--- a/mixlib/xmix_vm.h
+++ b/mixlib/xmix_vm.h
@@ -2,24 +2,24 @@
* This file contains internal declarations used in the implementation
* of the mix_vm_t type.
* ------------------------------------------------------------------
- * $Id: xmix_vm.h,v 1.7 2002/03/24 00:23:28 jao Exp $
+ * $Id: xmix_vm.h,v 1.8 2003/01/12 21:05:01 jao Exp $
* ------------------------------------------------------------------
- * Copyright (C) 2000, 2002 Free Software Foundation, Inc.
- *
+ * Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
+ *
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
+ *
*/
@@ -42,7 +42,7 @@ enum {
MEM_CELLS_MAX_ = MIX_VM_CELL_NO - 1
};
-struct mix_vm_t
+struct mix_vm_t
{
mix_word_t reg[IREG_NO_+3];
mix_word_t cell[MEM_CELLS_NO_];
@@ -50,7 +50,7 @@ struct mix_vm_t
mix_cmpflag_t cmpflag;
mix_short_t loc_count;
mix_vm_status_t status;
- mix_device_t * devices[BD_NO_];
+ mix_device_t * devices[BD_NO_];
mix_address_t start_addr; /* start address of loaded file */
GTree *line_table; /* source line no -> address */
GTree *address_table; /* adress -> source line no */
@@ -107,15 +107,15 @@ do { \
#define set_loc_(vm,x) (vm)->loc_count = (MEMOK_(x)? (x) : MIX_SHORT_ZERO)
#define set_status_(vm,s) ((vm)->status = (s))
+#define is_halted_(vm) ((vm)->status == MIX_VM_HALT)
+#define halt_(vm,val) ((vm)->status = (val)? MIX_VM_HALT : MIX_VM_RUNNING)
#define inc_loc_(vm) \
do { \
- if (vm->loc_count++ == MEM_CELLS_MAX_) \
- vm->loc_count = MIX_SHORT_ZERO; \
+ if (++(vm->loc_count) == MEM_CELLS_NO_) \
+ { vm->loc_count--; halt_(vm, TRUE); } \
} while(FALSE)
-#define is_halted_(vm) ((vm)->status == MIX_VM_HALT)
-#define halt_(vm,val) ((vm)->status = (val)? MIX_VM_HALT : MIX_VM_RUNNING)
#define set_start_(vm,val) ((vm)->start_addr = (val))
#define reset_loc_(vm) set_loc_ (vm, vm->start_addr)
#define update_time_(vm,ins) mix_vm_clock_add_lapse (get_clock_(vm), ins)