[patch] patch for bochs step bug

bochs-2.2.6-step.patch (text/plain), 2.46 KB, created by Daniel Gulotta on 2006-10-27 16:26:56 UTC

diff -r -u bochs-2.2.6/bx_debug/dbg_main.cc bochs-2.2.6-r1/bx_debug/dbg_main.cc
--- bochs-2.2.6/bx_debug/dbg_main.cc	2006-01-28 16:16:02.000000000 +0000
+++ bochs-2.2.6-r1/bx_debug/dbg_main.cc	2006-10-28 00:31:57.000000000 +0000
@@ -1132,36 +1132,41 @@
 
 void bx_dbg_stepN_command(bx_dbg_icount_t count)
 {
-  if (count == 0) {
-    dbg_printf("Error: stepN: count=0\n");
-    return;
-  }
-
-  // use simulation mode while executing instructions.  When the prompt
-  // is printed, we will return to config mode.
-  SIM->set_display_mode (DISP_MODE_SIM);
-
-  // single CPU
-  bx_guard.guard_for |= BX_DBG_GUARD_ICOUNT; // looking for icount
-  bx_guard.guard_for |= BX_DBG_GUARD_CTRL_C; // or Ctrl-C
-  // for now, step each CPU one BX_DBG_DEFAULT_ICOUNT_QUANTUM at a time
-  for (unsigned cycle=0; cycle < count; cycle++) {
-    for (unsigned cpu=0; cpu < BX_SMP_PROCESSORS; cpu++) {
-      bx_guard.icount = 1;
-      bx_guard.interrupt_requested = 0;
-      BX_CPU(cpu)->guard_found.guard_found = 0;
-      BX_CPU(cpu)->guard_found.icount = 0;
-      BX_CPU(cpu)->cpu_loop(-1);
+    if (count == 0) {
+      dbg_printf("Error: stepN: count=0\n");
+      return;
     }
-#if BX_SUPPORT_SMP == 0
-    // ticks are handled inside the cpu loop
-#else
-    BX_TICK1 ();
-#endif
-  }
-
-  BX_INSTR_DEBUG_PROMPT();
-  bx_dbg_print_guard_results();
+  
+    // use simulation mode while executing instructions.  When the prompt
+    // is printed, we will return to config mode.
+    SIM->set_display_mode(DISP_MODE_SIM);
+  
+    // single CPU
+    int old_guard = bx_guard.guard_for;
+    bx_guard.guard_for |= BX_DBG_GUARD_ICOUNT; // looking for icount
+    bx_guard.guard_for |= BX_DBG_GUARD_CTRL_C; // or Ctrl-C
+    bx_guard.guard_for &= ~BX_DBG_GUARD_IADDR_ALL;
+    // for now, step each CPU one instruction at a time
+    for (unsigned cycle=0; cycle < count; cycle++) {
+      for (unsigned cpu=0; cpu < BX_SMP_PROCESSORS; cpu++) {
+	    bx_guard.icount = 1;
+        bx_guard.interrupt_requested = 0;
+        int old_mode_break = BX_CPU(cpu)->mode_break;
+        BX_CPU(cpu)->guard_found.guard_found = 0;
+		BX_CPU(cpu)->guard_found.icount = 0;
+        BX_CPU(cpu)->cpu_loop(1);
+        BX_CPU(cpu)->mode_break = old_mode_break;
+      }
+  #if BX_SUPPORT_SMP == 0
+      // ticks are handled inside the cpu loop
+  #else
+      BX_TICK1();
+  #endif
+    }
+  
+    BX_INSTR_DEBUG_PROMPT();
+    bx_dbg_print_guard_results();
+    bx_guard.guard_for = old_guard;
 }
 
 static disassembler bx_disassemble;