Index: win32-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/win32-nat.c,v
retrieving revision 1.119
diff -u -p -r1.119 win32-nat.c
--- win32-nat.c	24 Jan 2006 22:09:28 -0000	1.119
+++ win32-nat.c	2 Feb 2006 11:44:08 -0000
@@ -83,12 +83,6 @@ static unsigned dr[8];
 static int debug_registers_changed;
 static int debug_registers_used;
 
-/* The string sent by cygwin when it processes a signal.
-   FIXME: This should be in a cygwin include file. */
-#ifndef _CYGWIN_SIGNAL_STRING
-#define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
-#endif
-
 #define CHECK(x)	check (x, __FILE__,__LINE__)
 #define DEBUG_EXEC(x)	if (debug_exec)		printf_unfiltered x
 #define DEBUG_EVENTS(x)	if (debug_events)	printf_unfiltered x
@@ -126,6 +120,12 @@ static DEBUG_EVENT current_event;	/* The
 static HANDLE current_process_handle;	/* Currently executing process */
 static thread_info *current_thread;	/* Info on currently selected thread */
 static DWORD main_thread_id;		/* Thread ID of the main thread */
+static int ignoring_faults;             /* If true, the inferior has signaled
+                                           that it is doing parameter checking
+                                           and has supplied its own
+                                           EXCEPTION_ACCESS_VIOLATION handler,
+                                           and there is no need to act on
+                                           them here.  */
 
 /* Counts of things. */
 static int exception_count = 0;
@@ -905,12 +905,7 @@ handle_output_debug_string (struct targe
       || !s || !*s)
     return gotasig;
 
-  if (strncmp (s, _CYGWIN_SIGNAL_STRING, sizeof (_CYGWIN_SIGNAL_STRING) - 1) != 0)
-    {
-      if (strncmp (s, "cYg", 3) != 0)
-	warning (("%s"), s);
-    }
-  else
+  if (strncmp (s, _CYGWIN_SIGNAL_STRING, sizeof (_CYGWIN_SIGNAL_STRING) - 1) == 0)
     {
       char *p;
       int sig = strtol (s + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
@@ -919,6 +914,21 @@ handle_output_debug_string (struct targe
       if (gotasig)
 	ourstatus->kind = TARGET_WAITKIND_STOPPED;
     }
+  else if (strncmp (s, _CYGWIN_FAULT_IGNORE_STRING, 
+		    sizeof (_CYGWIN_FAULT_IGNORE_STRING) - 1) == 0)
+    {
+      ignoring_faults = TRUE;
+    }
+  else if (strncmp (s, _CYGWIN_FAULT_NOIGNORE_STRING, 
+		    sizeof (_CYGWIN_FAULT_NOIGNORE_STRING) - 1) == 0)
+    {
+      ignoring_faults = FALSE;
+    }
+  else
+    {
+      if (strncmp (s, "cYg", 3) != 0)
+	warning (("%s"), s);
+    }
 
   xfree (s);
   return gotasig;
@@ -1066,10 +1076,11 @@ handle_exception (struct target_waitstat
       ourstatus->value.sig = TARGET_SIGNAL_SEGV;
       {
 	char *fn;
-	if (find_pc_partial_function ((CORE_ADDR) current_event.u.Exception
-				      .ExceptionRecord.ExceptionAddress,
-				      &fn, NULL, NULL)
-	    && strncmp (fn, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0)
+	if (ignoring_faults
+	    || (find_pc_partial_function ((CORE_ADDR) current_event.u.Exception
+					  .ExceptionRecord.ExceptionAddress,
+					  &fn, NULL, NULL)
+		&& strncmp (fn, "KERNEL32!IsBad", strlen ("KERNEL32!IsBad")) == 0))
 	  return 0;
       }
       break;
@@ -1434,6 +1445,7 @@ do_initial_win32_stuff (DWORD pid)
   exception_count = 0;
   debug_registers_changed = 0;
   debug_registers_used = 0;
+  ignoring_faults = FALSE;
   for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
     dr[i] = 0;
   current_event.dwProcessId = pid;