Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.

modules/rosapps/applications/sysutils/utils/pice/module/hooks.c

@@ -0,0 +1,177 @@
+/*++
+
+Copyright (c) 1998-2001 Klaus P. Gerlicher
+
+Module Name:
+
+    hooks.c
+
+Abstract:
+
+    hooking of interrupts
+
+Environment:
+
+    Kernel mode only
+
+Author:
+
+    Klaus P. Gerlicher
+
+Revision History:
+
+    16-Jul-1998:	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"
+
+////////////////////////////////////////////////////
+// PROTOTYPES
+////
+void DeinstallHooks(void);
+
+////////////////////////////////////////////////////
+// DEFINES
+////
+
+////////////////////////////////////////////////////
+// GLOBALS
+////
+
+// IDT entries
+//PIDTENTRY pidt[256];
+IDTENTRY oldidt[256]={{0},};
+
+IDTENTRY idt_snapshot[256]={{0},};
+
+// processor flag for interrupt suspension
+ULONG ulOldFlags;
+
+////////////////////////////////////////////////////
+// PROCEDURES
+////
+
+//*************************************************************************
+// MaskIrqs()
+//
+//*************************************************************************
+void MaskIrqs(void)
+{
+    ENTER_FUNC();
+
+    save_flags(ulOldFlags);
+    cli();
+
+    LEAVE_FUNC();
+}
+
+//*************************************************************************
+// UnmaskIrqs()
+//
+//*************************************************************************
+void UnmaskIrqs(void)
+{
+    ENTER_FUNC();
+
+    restore_flags(ulOldFlags);
+
+    LEAVE_FUNC();
+}
+
+//*************************************************************************
+// SetGlobalInt()
+//
+//*************************************************************************
+ULONG SetGlobalInt(ULONG dwInt,ULONG NewIntHandler)
+{
+    ULONG idt[2];
+    ULONG OldIntHandler;
+    struct IdtEntry* pidt;
+    struct IdtEntry oldidt;
+
+    ENTER_FUNC();
+
+	// get linear location of IDT
+	__asm__("sidt %0":"=m" (idt));
+
+	// get pointer to idte for int 3
+	pidt=((struct IdtEntry*)((idt[1]<<16)|((idt[0]>>16)&0x0000FFFF)))+dwInt;
+
+	oldidt=*pidt;
+
+    // set new handler address
+	pidt->HiOffset=(USHORT)(((ULONG)NewIntHandler)>>16);
+	pidt->LoOffset=(USHORT)(((ULONG)NewIntHandler)&0x0000FFFF);
+
+    DPRINT((0,"new INT(%0.2x) handler = %0.4x:%x\n",dwInt,pidt->SegSel,(pidt->HiOffset<<16)|(pidt->LoOffset&0x0000FFFF)));
+
+	OldIntHandler=(oldidt.HiOffset<<16)|(oldidt.LoOffset&0x0000FFFF);
+
+    DPRINT((0,"old INT(%0.2x) handler = %0.4x:%x\n",dwInt,pidt->SegSel,OldIntHandler));
+
+    LEAVE_FUNC();
+
+	return OldIntHandler;
+}
+
+//*************************************************************************
+// TakeIdtSnapshot()
+//
+//*************************************************************************
+void TakeIdtSnapshot(void)
+{
+    ULONG idt[2],i;
+    struct IdtEntry* pidt;
+
+	__asm__("sidt %0":"=m" (idt));
+
+	// get pointer to idte for int 3
+	pidt=((struct IdtEntry*)((idt[1]<<16)|((idt[0]>>16)&0x0000FFFF)));
+
+    for(i=0;i<256;i++)
+    {
+        DPRINT((11,"TakeIdtSnapShot(): saving vector %u\n",i));
+        if(IsRangeValid((ULONG)pidt,sizeof(*pidt)) )
+        {
+            DPRINT((11,"TakeIdtSnapShot(): vector %u valid\n",i));
+    	    idt_snapshot[i] = *pidt++;
+        }
+    }
+}
+
+//*************************************************************************
+// RestoreIdt()
+//
+//*************************************************************************
+void RestoreIdt(void)
+{
+    ULONG idt[2],i;
+    struct IdtEntry* pidt;
+
+	__asm__("sidt %0":"=m" (idt));
+
+    // get pointer to idte for int 3
+	pidt=((struct IdtEntry*)((idt[1]<<16)|((idt[0]>>16)&0x0000FFFF)));
+
+    for(i=0;i<256;i++)
+    {
+        DPRINT((11,"TakeIdtSnapShot(): restoring vector %u\n",i));
+        if(IsRangeValid((ULONG)pidt,sizeof(*pidt)) )
+        {
+            DPRINT((11,"TakeIdtSnapShot(): vector %u valid\n",i));
+    	    *pidt++ = idt_snapshot[i];
+        }
+    }
+}
+
+// EOF