- Tree cleanups proposed on the mailing list. Move all non-Core OS modules to rosapps. Tests were already moved by Fireball to rostests.

svn path=/trunk/; revision=26033

rosapps/sysutils/utils/pice/module/gpfault.c

@@ -0,0 +1,142 @@
+/*++
+
+Copyright (c) 1998-2001 Klaus P. Gerlicher
+
+Module Name:
+
+    GPFault.c
+
+Abstract:
+
+    handle general protection faults on x86
+
+Environment:
+
+    Kernel mode only
+
+Author:
+
+    Klaus P. Gerlicher
+
+Revision History:
+
+    13-Nov-1999:	created
+    15-Nov-2000:    general cleanup of source files
+
+Copyright notice:
+
+  This file may be distributed under the terms of the GNU Public License.
+
+--*/
+
+////////////////////////////////////////////////////
+// INCLUDES
+////
+#include "remods.h"
+#include "precomp.h"
+
+////////////////////////////////////////////////////
+// GLOBALS
+////
+ULONG OldGPFaultHandler = 0;
+
+char tempGP[1024];
+
+////////////////////////////////////////////////////
+// FUNCTIONS
+////
+
+//*************************************************************************
+// NewGPFaultHandler()
+//
+//*************************************************************************
+void HandleGPFault(FRAME* ptr)
+{
+	DPRINT((0,"HandleGPFault(): ptr = %x at eip: %x\n",ptr, ptr->eip));
+}
+
+//*************************************************************************
+// NewGPFaultHandler()
+//
+//*************************************************************************
+__asm__ ("\n\t \
+		NewGPFaultHandler:\n\t \
+		pushfl\n\t \
+        cli\n\t \
+        cld\n\t \
+        pushal\n\t \
+	    pushl %ds\n\t \
+\n\t \
+		// test for v86 mode\n\t \
+ 		testl $0x20000,40(%esp)\n\t \
+		jnz notv86\n\t \
+		popl %ds\n\t \
+        popal\n\t \
+		popfl\n\t \
+		.byte 0x2e\n\t \
+		jmp *_OldGPFaultHandler\n\t \
+		notv86:\n\t \
+		// setup default data selectors\n\t \
+	    movw %ss,%ax\n\t \
+	    movw %ax,%ds\n\t \
+\n\t \
+        // get frame ptr\n\t \
+        lea 40(%esp),%eax\n\t \
+		pushl %eax\n\t \
+        call _HandleGPFault\n\t \
+        addl $4,%esp\n\t \
+\n \t \
+		popl %ds\n\t \
+        popal\n\t \
+		popfl\n\t \
+		// remove error code from stack and replace with reason code\n\t \
+        movl $" STR(REASON_GP_FAULT) ",(%esp)\n\t \
+		// call debugger loop\n\t \
+		jmp NewInt31Handler\n\t \
+		");
+
+//*************************************************************************
+// InstallGPFaultHook()
+//
+//*************************************************************************
+void InstallGPFaultHook(void)
+{
+	ULONG LocalGPFaultHandler;
+
+	ENTER_FUNC();
+
+	MaskIrqs();
+	if(!OldGPFaultHandler)
+	{
+		__asm__("mov $NewGPFaultHandler,%0"
+			:"=r" (LocalGPFaultHandler)
+			:
+			:"eax");
+		OldGPFaultHandler=SetGlobalInt(0x0D,(ULONG)LocalGPFaultHandler);
+	}
+	UnmaskIrqs();
+
+    LEAVE_FUNC();
+}
+
+//*************************************************************************
+// DeInstallGPFaultHook()
+//
+//*************************************************************************
+void DeInstallGPFaultHook(void)
+{
+	ENTER_FUNC();
+
+	MaskIrqs();
+	if(OldGPFaultHandler)
+	{
+        RemoveAllSWBreakpoints(TRUE);
+		SetGlobalInt(0x0D,(ULONG)OldGPFaultHandler);
+        OldGPFaultHandler=0;
+	}
+	UnmaskIrqs();
+
+    LEAVE_FUNC();
+}
+
+// EOF