+++ /dev/null
-/*++
-
-Copyright (c) 1998-2001 Klaus P. Gerlicher
-
-Module Name:
-
- shell.c
-
-Abstract:
-
- user interface for debugger
-
-Environment:
-
- Kernel mode only
-
-Author:
-
- Klaus P. Gerlicher
-
-Revision History:
-
- 16-Jul-1998: created
- 22-Sep-1998: rewrite of keyboard hooking through patching the original keyboard driver
- 29-Sep-1998: started documentation on project
- 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"
-
-
-////////////////////////////////////////////////////
-// DEFINES
-////
-#define LINES_IN_COMMAND_BUFFER (64)
-
-////////////////////////////////////////////////////
-// PROTOTYPES
-////
-
-////////////////////////////////////////////////////
-// GLOBALS
-////
-
-ULONG bPreviousCommandWasGo = FALSE;
-
-// flags to set when we need to pass things to the old INT handlers
-ULONG dwCallOldInt1Handler = 0;
-ULONG dwCallOldInt3Handler = 0;
-ULONG dwCallOldIntEHandler = 0;
-ULONG dwCallOldGPFaultHandler = 0;
-
-ULONG g_ulLineNumberStart=0;
-ULONG ulWindowOffset = 0;
-BOOLEAN bStepThroughSource=FALSE;
-BOOLEAN bStepInto = FALSE;
-
-// key handling
-UCHAR ucConverted; // key converted from scancode to ANSI
-
-volatile BOOLEAN bControl=FALSE; // TRUE when CTRL key was pressed
-volatile BOOLEAN bShift=FALSE; // TRUE when SHIFT key was pressed
-volatile BOOLEAN bAlt=FALSE; // TRUE when ALT key was pressed
-volatile ULONG OldInt31Handler; // address of old keyboard ISR
-volatile ULONG OldGlobalInt31Handler; // address of old global keyboard ISR
-volatile BOOLEAN bEnterNow=FALSE; // TRUE if already stopped
-volatile BOOLEAN bNotifyToExit=FALSE; // TRUE when debugger should leave
-volatile BOOLEAN bSkipMainLoop=FALSE; // TRUE when debugger should skip main loop
-volatile UCHAR ucKeyPressedWhileIdle=0; // key pressed when system was stopped
-volatile BOOLEAN bInDebuggerShell=FALSE; // TRUE while in DebuggerShell()
-BOOLEAN bIrqStateAtBreak;
-
-ULONG ulRealStackPtr;
-static ULONG PCR_SEL = PCR_SELECTOR;
-static ULONG OLD_PCR;
-
-char tempShell[256]; // temporary string container
-
-// old address of display memory
-USHORT OldSelector=0;
-ULONG OldOffset=0;
-
-ULONG ulLastLineDisplayedOffset = 0;
-
-// functions of function keys
-char *szFunctionKeys[10]={
- "mod", // F1
- "proc", // F2
- "src", // F3
- "code", // F4
- "x", // F5
- "vma", // F6
- "", // F7
- "t", // F8
- "", // F9
- "p" // F10
-};
-
-// new stack for "deep parsing"
-ULONG aulNewStack[0x20000];
-ULONG ulOldStack;
-
-// registers save area (context)
-ULONG CurrentEIP,CurrentEFL;
-ULONG CurrentEAX,CurrentEBX,CurrentECX,CurrentEDX;
-ULONG CurrentESP,CurrentEBP,CurrentESI,CurrentEDI;
-USHORT CurrentCS,CurrentDS=0,CurrentES,CurrentFS,CurrentGS,CurrentSS;
-ULONG CurrentDR0,CurrentDR1,CurrentDR2,CurrentDR3,CurrentDR6,CurrentDR7;
-ULONG CurrentCR0,CurrentCR2,CurrentCR3;
-// previous context
-ULONG OldEIP=0,OldEFL;
-ULONG OldEAX,OldEBX,OldECX,OldEDX;
-ULONG OldESP,OldEBP,OldESI,OldEDI;
-USHORT OldCS=0,OldDS,OldES,OldFS,OldGS,OldSS;
-
-ULONG CurrentProcess;
-
-UCHAR ucCommandBuffer[256];
-USHORT usCurrentPosInInputBuffer=0;
-volatile BOOLEAN bSingleStep=FALSE;
-
-// the last command lines
-char aszCommandLines[LINES_IN_COMMAND_BUFFER][sizeof(ucCommandBuffer)+2];
-ULONG ulCommandInPos=0,ulCommandLastPos=0;
-ULONG ulCommandCurrentPos=0;
-
-
-extern ULONG KeyboardIRQL;
-
-//*************************************************************************
-// GetLinesInCommandHistory()
-//
-//*************************************************************************
-ULONG GetLinesInCommandHistory(void)
-{
- ULONG ulResult = (ulCommandInPos-ulCommandLastPos)%LINES_IN_COMMAND_BUFFER;
-
- ENTER_FUNC();
-
- DPRINT((0,"GetLinesInCommandHistory() returns %u (ulIn %u ulLast %u)\n",ulResult,ulCommandInPos,ulCommandLastPos));
-
- LEAVE_FUNC();
-
- return ulResult;
-}
-
-//*************************************************************************
-// AddToCommandLineHistory()
-//
-//*************************************************************************
-void AddToCommandLineHistory(LPSTR s)
-{
- ULONG i;
-
- ENTER_FUNC();
- DPRINT((0,"AddToCommandLineHistory(%s)\n",s));
-
- if(PICE_strlen(s))
- {
- for(i=0;i<LINES_IN_COMMAND_BUFFER;i++)
- {
- if(PICE_strcmpi(&aszCommandLines[i][1],s) == 0)
- {
- DPRINT((0,"AddToCommandLineHistory(): command line already exists\n"));
- LEAVE_FUNC();
- return;
- }
- }
- aszCommandLines[ulCommandInPos][0]=':';
- PICE_strcpy(&aszCommandLines[ulCommandInPos][1],s);
- ulCommandCurrentPos = ulCommandInPos = (ulCommandInPos +1)%LINES_IN_COMMAND_BUFFER;
- if(ulCommandInPos == ulCommandLastPos)
- {
- ulCommandLastPos = (ulCommandLastPos+1)%LINES_IN_COMMAND_BUFFER;
- }
- }
-
- LEAVE_FUNC();
-}
-
-//*************************************************************************
-// GetFromCommandLineHistory()
-//
-//*************************************************************************
-LPSTR GetFromCommandLineHistory(ULONG ulCurrentCommandPos)
-{
- LPSTR pRet;
-
- ENTER_FUNC();
-
- DPRINT((0,"GetFromCommandLineHistory(): current = %u\n",ulCurrentCommandPos));
-
- // skip leading ':'
- pRet = aszCommandLines[ulCurrentCommandPos] + 1;
-
- DPRINT((0,"GetFromCommandLineHistory(%s)\n",pRet));
-
- LEAVE_FUNC();
-
- return pRet;
-}
-
-//*************************************************************************
-// ShowStatusLine()
-//
-//*************************************************************************
-void ShowStatusLine(void)
-{
- PEPROCESS pCurrentProcess = IoGetCurrentProcess();
- LPSTR pProcessName;
-
- ENTER_FUNC();
-
- if(IsAddressValid((ULONG)pCurrentProcess))
- {
- SetForegroundColor(COLOR_TEXT);
- SetBackgroundColor(COLOR_CAPTION);
-
- ClrLine(wWindow[OUTPUT_WINDOW].y-1);
-
- pProcessName = pCurrentProcess->ImageFileName;
- if(IsAddressValid((ULONG)pProcessName) )
- {
- PICE_sprintf(tempShell,
- " PROCESS(%.8X \"%s\") ",
- (ULONG)pCurrentProcess,pProcessName);
- }
- else
- {
- PICE_sprintf(tempShell,
- " PROCESS(%.8X) ",
- (ULONG)pCurrentProcess);
- }
- PutChar(tempShell,1,wWindow[OUTPUT_WINDOW].y-1);
-
- ResetColor();
- }
-
- LEAVE_FUNC();
-}
-
-//*************************************************************************
-// ProcessBootParams()
-//
-//*************************************************************************
-void ProcessBootParams(void)
-{
- LPSTR p1,p2;
-
- ENTER_FUNC();
- if(*szBootParams)
- {
- DPRINT((0,"ProcessBootParams()\n"));
-
- p1 = szBootParams;
-
- while(*p1)
- {
- p2 = ucCommandBuffer;
- DPRINT((0,"ProcessBootParams(): boot params = %s\n",p1));
- while(*p1 && *p1!=';')
- {
- *p2++ = *p1++;
- }
- *p2=0;
- DPRINT((0,"ProcessBootParams(): cmd buf = %s\n",ucCommandBuffer));
- if(*p1 != ';')
- {
- DPRINT((0,"ProcessBootParams(): error in cmd buf\n"));
- break;
- }
- p1++;
- DPRINT((0,"ProcessBootParams(): next cmd buf = %s\n",p1));
-
- Parse(ucCommandBuffer,TRUE);
- }
- PICE_memset(ucCommandBuffer,0,sizeof(ucCommandBuffer));
- *szBootParams = 0;
- }
- LEAVE_FUNC();
-}
-
-//*************************************************************************
-// bNoCtrlKeys()
-//
-//*************************************************************************
-BOOLEAN __inline bNoCtrlKeys(void)
-{
- return (!bControl && !bAlt && !bShift);
-}
-
-
-//*************************************************************************
-// DebuggerShell()
-//
-// handle user interface when stopped system
-//*************************************************************************
-void DebuggerShell(void)
-{
- ARGS Args;
- UCHAR speaker;
- PEPROCESS pCurrentProcess;
-
- ENTER_FUNC();
-
- // save the graphics state
- SaveGraphicsState();
-
- // tell USER we are stopped
- ShowStoppedMsg();
-
- FlushKeyboardQueue();
-
- CheckRingBuffer();
-
- // kill the speakers annoying beep
- speaker = inb_p((PCHAR)0x61);
- speaker &= 0xFC;
- outb_p(speaker,(PCHAR)0x61);
-
- ProcessBootParams();
-
- DPRINT((0,"DebuggerShell(): DisplayRegs()\n"));
- // display register contents
- DisplayRegs();
-
- DPRINT((0,"DebuggerShell(): DisplayMemory()\n"));
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
-
- DPRINT((0,"DebuggerShell(): Unassemble()\n"));
-
- // disassembly from current address
- PICE_memset(&Args,0,sizeof(ARGS));
- Args.Value[0]=CurrentCS;
- Args.Value[1]=CurrentEIP;
- Args.Count=2;
- Unassemble(&Args);
-
- // try to find current process's name
- pCurrentProcess = IoGetCurrentProcess();
- CurrentProcess = (ULONG)pCurrentProcess;
-
- // display status line
- ShowStatusLine();
-
- // switch on cursor
- ShowCursor();
-
- // while we are not told to exit
- while(bNotifyToExit==FALSE)
- {
- // emulate graphics cursor
- PrintCursor(FALSE);
-
- // we have a key press
- if((ucKeyPressedWhileIdle = GetKeyPolled())!=0)
- {
- DPRINT((0,"DebuggerShell(): key = %x control = %u shift = %u\n",ucKeyPressedWhileIdle,bControl,bShift));
-
- // if cursor reversed, normalize it again (only graphics)
- if(bRev)
- {
- PrintCursor(TRUE);
- }
-
- // convert key to ANSI, if success add to command buffer and try to
- // find a command that fits the already entered letters
- ucConverted = AsciiFromScan((UCHAR)(ucKeyPressedWhileIdle&0x7f));
-
-#if 0
- PICE_sprintf(tempShell,"%u -> %u",ucKeyPressedWhileIdle, ucConverted);
- PutChar(tempShell,GLOBAL_SCREEN_WIDTH-32,wWindow[OUTPUT_WINDOW].y-1);
-#endif
-
- if(!bControl && !bAlt && ucConverted)
- {
- DPRINT((0,"DebuggerShell(): normal key\n"));
- if(!(usCurrentPosInInputBuffer==0 && ucConverted==' '))
- {
- // if we have space in the command buffer
- // put the character there
- if(usCurrentPosInInputBuffer<sizeof(ucCommandBuffer)-1)
- {
- ucCommandBuffer[usCurrentPosInInputBuffer++]=ucConverted;
- // output the character
- PICE_sprintf(tempShell,"%c",ucConverted);
- wWindow[OUTPUT_WINDOW].usCurX = 1;
- Print(OUTPUT_WINDOW,tempShell);
- }
- // if we have something in command buffer
- // try to find command help that fits
- if(usCurrentPosInInputBuffer)
- {
- FindCommand(ucCommandBuffer);
- }
- else ShowStoppedMsg();
- }
- }
- // normal key while holding down CONTROL
- else if(bControl && !bAlt && !bShift && ucConverted)
- {
- if(ucConverted == 'f')
- bNotifyToExit = TRUE;
- }
- // normal key while holding down ALT
- else if(!bControl && bAlt && !bShift && ucConverted)
- {
- }
- // normal key while holding down ALT & CONTROL
- else if(bControl && bAlt && !bShift && ucConverted)
- {
- }
- // we didn't get a converted key
- // so this must be a control key
- else
- {
- // RETURN
- if(bNoCtrlKeys() && ucKeyPressedWhileIdle == SCANCODE_ENTER)
- {
- DPRINT((0,"DebuggerShell(): RETURN\n"));
- ucCommandBuffer[usCurrentPosInInputBuffer]=0;
- if(ucCommandBuffer[0])
- {
- AddToCommandLineHistory(ucCommandBuffer);
- ClrLine(wWindow[OUTPUT_WINDOW].y+wWindow[OUTPUT_WINDOW].usCurY);
- ulLastLineDisplayedOffset = 0;
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
- // setup a safe stack for parsing
- __asm__ __volatile__("\n\t \
- movl %2,%%eax\n\t \
- movl %%esp,%%ebx\n\t \
- mov %%ebx,%0\n\t \
- leal _aulNewStack,%%ebx\n\t \
- addl $0x1FFF0,%%ebx\n\t \
- movl %%ebx,%%esp\n\t \
- pushl $0\n\t \
- pushl %%eax\n\t \
- call _Parse\n\t \
- movl %0,%%ebx\n\t \
- movl %%ebx,%%esp"
- :"=m" (ulOldStack)
- :"m" (ulOldStack),"m" (ucCommandBuffer)
- :"eax","ebx");
-
- ShowStoppedMsg();
- }
- else
- {
- if(ulLastLineDisplayedOffset)
- {
- ulLastLineDisplayedOffset = 0;
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
- }
- }
- usCurrentPosInInputBuffer=0;
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- }
- // backspace
- else if(bNoCtrlKeys() && ucKeyPressedWhileIdle == SCANCODE_BACKSPACE)
- {
- DPRINT((0,"DebuggerShell(): BACKSPACE\n"));
- if(usCurrentPosInInputBuffer)
- {
- if(usCurrentPosInInputBuffer)
- FindCommand(ucCommandBuffer);
- else
- ShowStoppedMsg();
-
- usCurrentPosInInputBuffer--;
- ucCommandBuffer[usCurrentPosInInputBuffer]=0;
- Print(OUTPUT_WINDOW,"\b");
- }
- }
- // Tab
- else if(bNoCtrlKeys() && ucKeyPressedWhileIdle==SCANCODE_TAB)
- {
- DPRINT((0,"DebuggerShell(): TAB\n"));
- if(usCurrentPosInInputBuffer)
- {
- LPSTR pCmd;
-
- if((pCmd=FindCommand(ucCommandBuffer)) )
- {
- ULONG i;
-
- // clear the displayed command line
- for(i=0;i<usCurrentPosInInputBuffer;i++)
- Print(OUTPUT_WINDOW,"\b");
- // clear command buffer
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- // copy the found command into command buffer
- PICE_strcpy(ucCommandBuffer,pCmd);
- PICE_strcat(ucCommandBuffer," ");
- usCurrentPosInInputBuffer = PICE_strlen(ucCommandBuffer);
- Print(OUTPUT_WINDOW,ucCommandBuffer);
- }
- }
- }
- else
- {
- // function keys
- if(bNoCtrlKeys() && ucKeyPressedWhileIdle>=59 && ucKeyPressedWhileIdle<69)
- {
- DPRINT((0,"DebuggerShell(): FUNCTION %u\n",ucKeyPressedWhileIdle-59));
- PICE_sprintf(tempShell,":");
- ReplaceRingBufferCurrent(tempShell);
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- usCurrentPosInInputBuffer=0;
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
- PICE_strcpy(ucCommandBuffer,szFunctionKeys[ucKeyPressedWhileIdle-59]);
- usCurrentPosInInputBuffer=PICE_strlen(ucCommandBuffer);
- if(ucCommandBuffer[0])
- {
- ulLastLineDisplayedOffset = 0;
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
-
- // setup a safe stack for parsing
- __asm__ __volatile__("\n\t \
- movl %2,%%eax\n\t \
- movl %%esp,%%ebx\n\t \
- mov %%ebx,%0\n\t \
- leal _aulNewStack,%%ebx\n\t \
- addl $0x1FFF0,%%ebx\n\t \
- movl %%ebx,%%esp\n\t \
- pushl $1\n\t \
- pushl %%eax\n\t \
- call _Parse\n\t \
- movl %0,%%ebx\n\t \
- movl %%ebx,%%esp"
- :"=m" (ulOldStack)
- :"m" (ulOldStack),"m" (ucCommandBuffer)
- :"eax","ebx");
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- usCurrentPosInInputBuffer=0;
- }
- }
- else
- {
- switch(ucKeyPressedWhileIdle)
- {
- case SCANCODE_ESC:
- if(usCurrentPosInInputBuffer)
- {
- PICE_sprintf(tempShell,":");
- ReplaceRingBufferCurrent(tempShell);
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- usCurrentPosInInputBuffer=0;
- Print(OUTPUT_WINDOW,"");
- ShowStoppedMsg();
- }
- break;
- case SCANCODE_HOME: // home
- DPRINT((0,"DebuggerShell(): HOME\n"));
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window home\n"));
- OldOffset=0x0;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- // output window
- else if(bShift)
- {
- DPRINT((0,"DebuggerShell(): output window home\n"));
- if(ulLastLineDisplayedOffset != LinesInRingBuffer()-wWindow[OUTPUT_WINDOW].cy)
- {
- ulLastLineDisplayedOffset = LinesInRingBuffer()-wWindow[OUTPUT_WINDOW].cy+1;
- PrintRingBufferHome(wWindow[OUTPUT_WINDOW].cy-1);
- }
- }
- // source window home
- else if(bControl)
- {
- if(ulCurrentlyDisplayedLineNumber>0)
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber = 1;
-
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- 1,-1);
- }
- }
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- break;
- case SCANCODE_END: // end
- DPRINT((0,"DebuggerShell(): END\n"));
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window end\n"));
- OldOffset=0xFFFFFFFF-0x10*4;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- // output window
- else if(bShift)
- {
- DPRINT((0,"DebuggerShell(): output window end\n"));
- if(ulLastLineDisplayedOffset)
- {
- ulLastLineDisplayedOffset = 0;
-
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
- }
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- break;
- case SCANCODE_UP: // up
- DPRINT((0,"DebuggerShell(): UP\n"));
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window up\n"));
- OldOffset-=0x10;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- // output window
- else if(bShift)
- {
- DPRINT((0,"DebuggerShell(): output window up ulLastLineDisplayedOffset = %u\n",ulLastLineDisplayedOffset));
-
- if(ulLastLineDisplayedOffset+wWindow[OUTPUT_WINDOW].cy < LinesInRingBuffer())
- {
- ulLastLineDisplayedOffset += 1;
-
- PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset);
- }
- }
- // source window up
- else if(bControl)
- {
- if((ulCurrentlyDisplayedLineNumber-1)>0 && PICE_strlen(szCurrentFile) )
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber--;
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber,-1);
- }
- }
- else
- {
- UnassembleOneLineUp();
- }
- }
- // command line history
- else if(!bShift && !bControl && !bAlt)
- {
- LPSTR pCurrentCmd;
- ULONG len;
-
- DPRINT((0,"DebuggerShell(): command line up\n"));
-
- // only if anything in history
- if(GetLinesInCommandHistory())
- {
- // go to next entry in history
- if(ulCommandCurrentPos)
- ulCommandCurrentPos = (ulCommandCurrentPos-1)%GetLinesInCommandHistory();
- else
- ulCommandCurrentPos = GetLinesInCommandHistory()-1;
- DPRINT((0,"DebuggerShell(): current history pos = %u\n",ulCommandCurrentPos));
- // get this entry
- pCurrentCmd = GetFromCommandLineHistory(ulCommandCurrentPos);
- // if it has a string attached
- if((len = PICE_strlen(pCurrentCmd)))
- {
- // replace the current command line
- PICE_sprintf(tempShell,":");
- ReplaceRingBufferCurrent(tempShell);
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- PICE_strcpy(ucCommandBuffer,pCurrentCmd);
- usCurrentPosInInputBuffer=len;
- Print(OUTPUT_WINDOW,pCurrentCmd);
- }
- }
- }
- break;
- case SCANCODE_DOWN: // down
- DPRINT((0,"DebuggerShell(): DOWN\n"));
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window down\n"));
- OldOffset+=0x10;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- // output window
- else if(bShift)
- {
- DPRINT((0,"DebuggerShell(): output window down ulLastLineDisplayedOffset = %u\n",ulLastLineDisplayedOffset));
- if(ulLastLineDisplayedOffset)
- {
- ulLastLineDisplayedOffset -= 1;
-
- if(!PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset))
- {
- ulLastLineDisplayedOffset = 0;
- PrintRingBuffer(wWindow[OUTPUT_WINDOW].cy-1);
- }
- }
- }
- // source window down
- else if(bControl)
- {
- if(ulCurrentlyDisplayedLineNumber>0 && PICE_strlen(szCurrentFile))
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber++;
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber,-1);
- }
- }
- else
- {
- UnassembleOneLineDown();
- }
- }
- // command line history
- else if(!bShift && !bControl && !bAlt)
- {
- LPSTR pCurrentCmd;
- ULONG len;
-
- DPRINT((0,"DebuggerShell(): command line down\n"));
-
- // only if anything in history
- if(GetLinesInCommandHistory())
- {
- // go to next entry in history
- ulCommandCurrentPos = (ulCommandCurrentPos+1)%(GetLinesInCommandHistory());
- DPRINT((0,"DebuggerShell(): current history pos = %u\n",ulCommandCurrentPos));
- // get this entry
- pCurrentCmd = GetFromCommandLineHistory(ulCommandCurrentPos);
- // if it has a string attached
- if((len = PICE_strlen(pCurrentCmd)))
- {
- // replace the current command line
- PICE_sprintf(tempShell,":");
- ReplaceRingBufferCurrent(tempShell);
- PICE_memset(&ucCommandBuffer,0,sizeof(ucCommandBuffer));
- PICE_strcpy(ucCommandBuffer,pCurrentCmd);
- usCurrentPosInInputBuffer=len;
- Print(OUTPUT_WINDOW,pCurrentCmd);
- }
- }
- }
- break;
- case SCANCODE_LEFT: // left
- DPRINT((0,"DebuggerShell(): LEFT\n"));
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window left\n"));
-
- OldOffset-=0x1;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- else if(bControl)
- {
- if(ulWindowOffset > 0)
- ulWindowOffset--;
- PICE_memset(&Args,0,sizeof(ARGS));
- Args.Count=0;
- Unassemble(&Args);
- }
- break;
- case SCANCODE_RIGHT: // right
- // memory window
- if(bAlt)
- {
- DPRINT((0,"DebuggerShell(): data window right\n"));
-
- OldOffset+=0x1;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- else if(bControl)
- {
- if(ulWindowOffset < 80)
- ulWindowOffset++;
- PICE_memset(&Args,0,sizeof(ARGS));
- Args.Count=0;
- Unassemble(&Args);
- }
- break;
- case SCANCODE_PGUP: // page up
- DPRINT((0,"DebuggerShell(): PAGEUP\n"));
- // memory window
- if(bAlt)
- {
- OldOffset-=wWindow[DATA_WINDOW].cy*0x10;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- // output window
- else if(bShift)
- {
- if(ulLastLineDisplayedOffset+2*(wWindow[OUTPUT_WINDOW].cy) < LinesInRingBuffer())
- {
- ulLastLineDisplayedOffset += (wWindow[OUTPUT_WINDOW].cy);
-
- PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset);
- }
- else
- {
- if(ulLastLineDisplayedOffset != LinesInRingBuffer()-wWindow[OUTPUT_WINDOW].cy)
- {
- ulLastLineDisplayedOffset = LinesInRingBuffer()-wWindow[OUTPUT_WINDOW].cy;
- PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset);
- }
- }
- }
- // source window page up
- else if(bControl)
- {
- if(PICE_strlen(szCurrentFile))
- {
- if((ulCurrentlyDisplayedLineNumber-wWindow[SOURCE_WINDOW].cy)>0)
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber -= wWindow[SOURCE_WINDOW].cy;
-
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber ,-1);
- }
- }
- else
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber = 1;
-
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber ,-1);
- }
- }
- }
- else
- {
- UnassembleOnePageUp(wWindow[SOURCE_WINDOW].cy);
- }
-
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- break;
- case SCANCODE_PGDN: // page down
- DPRINT((0,"DebuggerShell(): PAGEDOWN\n"));
- // memory window
- if(bAlt)
- {
- OldOffset+=wWindow[DATA_WINDOW].cy*0x10;
- // display data window
- Args.Value[0]=OldSelector;
- Args.Value[1]=OldOffset;
- Args.Count=2;
- DisplayMemory(&Args);
- }
- else if(bShift)
- {
- if(ulLastLineDisplayedOffset>wWindow[OUTPUT_WINDOW].cy)
- {
- ulLastLineDisplayedOffset -= (wWindow[OUTPUT_WINDOW].cy);
-
- PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset);
- }
- else
- {
- if(ulLastLineDisplayedOffset)
- {
- ulLastLineDisplayedOffset = 0;
- PrintRingBufferOffset(wWindow[OUTPUT_WINDOW].cy-1,ulLastLineDisplayedOffset);
- }
- }
- }
- else if(bControl)
- {
- if(PICE_strlen(szCurrentFile) )
- {
- if((ulCurrentlyDisplayedLineNumber+wWindow[SOURCE_WINDOW].cy)>0)
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber += wWindow[SOURCE_WINDOW].cy;
-
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber ,-1);
- }
- }
- else
- {
- PICE_SYMBOLFILE_SOURCE* pSrc;
-
- if(ConvertTokenToSrcFile(szCurrentFile,(PULONG)&pSrc) )
- {
- ulCurrentlyDisplayedLineNumber = 1;
-
- DisplaySourceFile((LPSTR)pSrc+sizeof(PICE_SYMBOLFILE_SOURCE),
- (LPSTR)pSrc+pSrc->ulOffsetToNext,
- ulCurrentlyDisplayedLineNumber ,-1);
- }
- }
- }
- else
- {
- UnassembleOnePageDown(wWindow[SOURCE_WINDOW].cy);
- }
- }
- else if(!bShift && !bControl && !bAlt)
- {
- }
- break;
- }
- }
- }
- }
- ucKeyPressedWhileIdle=0;
- }
- }
-
- SaveOldRegs();
-
- PrintLogo(TRUE);
-
- ShowRunningMsg();
-
- if(bRev)
- PrintCursor(TRUE);
-
- // hide the cursor
- HideCursor();
-
- FlushKeyboardQueue();
-
- RestoreGraphicsState();
-
- LEAVE_FUNC();
-}
-
-//*************************************************************************
-// RealIsr()
-//
-//*************************************************************************
-void RealIsr(ULONG dwReasonForBreak)
-{
- BOOLEAN ReinstallPermanentBp = FALSE;
-
- DPRINT((0,"reason: %u#################################################################\n", dwReasonForBreak));
- ENTER_FUNC();
-
- // in handler
- bInDebuggerShell = TRUE;
-
- bStepping = FALSE;
-
- // don't assume we must call original handlers yet
- dwCallOldInt1Handler = dwCallOldInt3Handler = dwCallOldIntEHandler = dwCallOldGPFaultHandler = 0;
- bSkipMainLoop = FALSE;
- bEnterNow = FALSE;
-
- // reset trace flag (TF) on the stack
- CurrentEFL&=(~0x100);
-
- InstallPrintkHook();
-
- // control is not depressed
- bControl=FALSE;
-
- bIrqStateAtBreak = ((CurrentEFL&(1<<9))!=0);
-
- DPRINT((0,"\nbInDebuggerShell %x, dwReasonForBreak: %x, bIrqStateAtBreak: %d\n", bInDebuggerShell, dwReasonForBreak, bIrqStateAtBreak));
- DPRINT((0,"CurrentEIP: %x, CurrentESP: %x\n", CurrentEIP, CurrentESP));
-
- // came in because TF flag was set
- if(dwReasonForBreak == REASON_SINGLESTEP)
- {
- ULONG ulAddress,ulAddressCurrent;
-
- DPRINT((0,"REASON_SINGLESTEP: bSingleStep: %u\n", bSingleStep));
-
- if(!bSingleStep)
- {
- dwCallOldInt1Handler = 1;
- DPRINT((0,"no single step requested: %u!\n", dwCallOldInt1Handler));
- goto common_return_point;
- }
-
- ulAddress = GetLinearAddress(OldCS,OldEIP);
- ulAddressCurrent = GetLinearAddress(CurrentCS,CurrentEIP);
-
- // if we came in because we needed to skip past a permanent
- // INT3 hook, we need to put the INT3 back in place and
- // simply restart the system.
- if(NeedToReInstallSWBreakpoints(ulAddress,TRUE) )
- {
- DPRINT((0,"reinstalling INT3 @ %.4X:%.8X\n",OldCS,OldEIP));
-
- ReInstallSWBreakpoint(ulAddress);
-
- // previous command was go i.e. we did not single-step over a location
- // where a permanent breakpoint was installed (Printk() etc.) we simply restart
- // else we must stop the system.
- if(bPreviousCommandWasGo)
- {
- bPreviousCommandWasGo = FALSE;
- bInDebuggerShell = FALSE;
-
- if(bStepThroughSource)
- {
- // set TF flag
- CurrentEFL |= 0x100;
- }
-
- LEAVE_FUNC();
- DPRINT((0,"singlestep-----------------------------------------------------------------\n"));
- return;
- }
- bPreviousCommandWasGo = FALSE;
- }
-
- if(IsSwBpAtAddressInstalled(ulAddressCurrent))
- DeInstallSWBreakpoint(ulAddressCurrent);
-
- // we came here while stepping through source code block
- if(bStepThroughSource)
- {
- ULONG ulLineNumber;
- LPSTR pSrc,pFileName;
-
- DPRINT((0,"RealIsr(): stepping through source!\n"));
-
- // look up the corresponding source line
- // if there isn't any or the source line number has changed
- // we break back into the debugger
- if(bShowSrc)
- pSrc = FindSourceLineForAddress(ulAddressCurrent,&ulLineNumber,NULL,NULL,&pFileName);
- else pSrc = NULL;
-
- DPRINT((0,"RealIsr(): line #%u pSrc=%x (old line #%u)\n",ulLineNumber,(ULONG)pSrc,g_ulLineNumberStart));
-
- // if we have found a source line there
- if(pSrc && ulLineNumber==g_ulLineNumberStart)
- {
- DPRINT((0,"RealIsr(): stepping through line #%u in file = %s!\n",ulLineNumber,pFileName));
-
- if(bStepInto)
- StepInto(NULL);
- else
- StepOver(NULL);
-
- bInDebuggerShell = FALSE;
- LEAVE_FUNC();
- DPRINT((0,"singstep-----------------------------------------------------------------\n"));
- return;
- }
- bStepThroughSource = FALSE;
- bNotifyToExit = FALSE;
- bSkipMainLoop = FALSE;
- }
- }
- // came in because hardware register triggered a breakpoint
- else if(dwReasonForBreak == REASON_HARDWARE_BP)
- {
- ULONG ulReason;
-
- DPRINT((0,"REASON_HARDWARE_BP\n"));
-
- // disable HW breakpoints
- __asm__("\n\t \
- movl %%dr6,%%eax\n\t \
- movl %%eax,%0\n\t \
- xorl %%eax,%%eax\n\t \
- movl %%eax,%%dr6\n\t \
- movl %%eax,%%dr7"
- :"=m" (ulReason)
- :
- :"eax"
- );
-
- DPRINT((0,"REASON_HARDWARE_BP: %x\n",(ulReason&0xF)));
-
- // HW breakpoint DR1 (skip: only used in init_module detection)
- if(ulReason&0x2)
- {
- CurrentEFL |=(1<<16); // set resume flag
-
- bSkipMainLoop = TRUE;
-
- TryToInstallVirtualSWBreakpoints();
- }
- // HW breakpoint DR0
- else if(ulReason&0x1)
- {
- ULONG ulAddressCurrent;
-
- ulAddressCurrent = GetLinearAddress(CurrentCS,CurrentEIP);
-
- // we came here while stepping through source code block
- if(bStepThroughSource)
- {
- ULONG ulLineNumber;
- LPSTR pSrc,pFileName;
-
- DPRINT((0,"RealIsr(): stepping through source! [2]\n"));
-
- // look up the corresponding source line
- // if there isn't any or the source line number has changed
- // we break back into the debugger
- if(bShowSrc)
- pSrc = FindSourceLineForAddress(ulAddressCurrent,&ulLineNumber,NULL,NULL,&pFileName);
- else
- pSrc = NULL;
-
- DPRINT((0,"RealIsr(): line #%u pSrc=%x (old line #%u) [2]\n",ulLineNumber,(ULONG)pSrc,g_ulLineNumberStart));
-
- // if we have found a source line there
- if(pSrc && ulLineNumber==g_ulLineNumberStart)
- {
- DPRINT((0,"RealIsr(): stepping through line #%u in file = %s! [2]\n",ulLineNumber,pFileName));
-
- if(bStepInto)
- StepInto(NULL);
- else
- StepOver(NULL);
-
- bInDebuggerShell = FALSE;
- LEAVE_FUNC();
- DPRINT((0,"rrr-----------------------------------------------------------------\n"));
- return;
- }
- bNotifyToExit = FALSE;
- bSkipMainLoop = FALSE;
- bStepThroughSource = FALSE;
- }
- }
- }
- else if(dwReasonForBreak==REASON_INT3)
- {
- ULONG ulAddress;
-
- DPRINT((0,"REASON_INT3\n"));
-
- // must subtract one cause INT3s are generated after instructions execution
- CurrentEIP--;
-
- // make a flat address
- ulAddress = GetLinearAddress(CurrentCS,CurrentEIP);
-
- DPRINT((0,"INT3 @ %.8X\n",ulAddress));
-
- // if there's a breakpoint installed at current EIP remove it
- if(DeInstallSWBreakpoint(ulAddress) )
- {
- PSW_BP p;
-
- DPRINT((0,"INT3 @ %.8X removed\n",ulAddress));
-
- // if it's permanent (must be Printk() ) skip the DebuggerShell() and
- // do a callback
- if( (p = IsPermanentSWBreakpoint(ulAddress)) )
- {
- DPRINT((0,"permanent breakpoint\n"));
-
- ReinstallPermanentBp = TRUE;
-
- OldCS = CurrentCS;
- OldEIP = CurrentEIP;
-
- bSkipMainLoop = TRUE;
- DPRINT((0,"callback at %x\n",p->Callback));
- if(p->Callback)
- p->Callback();
- }
- else
- {
- LPSTR pFind;
- if(ScanExportsByAddress(&pFind,GetLinearAddress(CurrentCS,CurrentEIP)))
- {
- PICE_sprintf(tempShell,"pICE: SW Breakpoint at %s (%.4X:%.8X)\n",pFind,CurrentCS,CurrentEIP);
- }
- else
- {
- PICE_sprintf(tempShell,"pICE: SW Breakpoint at %.4X:%.8X\n",CurrentCS,CurrentEIP);
- }
- Print(OUTPUT_WINDOW,tempShell);
- }
- CurrentEFL &= ~(1<<16); // clear resume flag
- }
- else
- {
- LPSTR pFind;
- PEPROCESS my_current = IoGetCurrentProcess();
-
- DPRINT((0,"can't deinstall, somebody else's breakpoint\n"));
-
-
- // if no other debugger is running on this process and the address is
- // above TASK_SIZE we assume this to be a hard embedded INT3
-/*
-#if REAL_LINUX_VERSION_CODE < 0x020400
- if(ulAddress<TASK_SIZE && !(my_current->flags & PF_PTRACED) )
-#else
- if(ulAddress<TASK_SIZE && !(my_current->ptrace & PT_PTRACED) )
-#endif
-*/
- if( ulAddress )
- {
- if(ScanExportsByAddress(&pFind,GetLinearAddress(CurrentCS,CurrentEIP)))
- {
- PICE_sprintf(tempShell,"pICE: break due to embedded INT 3 at %s (%.4X:%.8X)\n",pFind,CurrentCS,CurrentEIP);
- }
- else
- {
- PICE_sprintf(tempShell,"pICE: break due to embedded INT 3 at user-mode address %.4X:%.8X\n",CurrentCS,CurrentEIP);
- }
- Print(OUTPUT_WINDOW,tempShell);
- CurrentEFL &= ~(1<<16); // clear resume flag
- }
- // well someone is already debugging this, we must pass the INT3 on to old handler
- // but only when it's a user-mode address
-/*
- else
- {
- if(ulAddress<TASK_SIZE || !bInt3Here)
- {
- DPRINT((0,"SW Breakpoint but debugged by other process at %.4X:%.8X\n",CurrentCS,CurrentEIP));
- // call the old handler on return from RealIsr()
- dwCallOldInt3Handler = 1;
- // and skip DebuggerShell()
- bSkipMainLoop = TRUE;
- }
- else
- {
- if(ScanExportsByAddress(&pFind,GetLinearAddress(CurrentCS,CurrentEIP)))
- {
- PICE_sprintf(tempShell,"pICE: break due to embedded INT 3 at (%s) %.4X:%.8X\n",
- pFind,CurrentCS,CurrentEIP);
- }
- else
- {
- PICE_sprintf(tempShell,"pICE: break due to embedded INT 3 at kernel-mode address %.4X:%.8X\n",
- CurrentCS,CurrentEIP);
- }
- Print(OUTPUT_WINDOW,tempShell);
- CurrentEFL &= ~(1<<16); // clear resume flag
- }
- }
-*/
- // skip INT3
- CurrentEIP++;
- }
- }
- else if(dwReasonForBreak == REASON_PAGEFAULT)
- {
- LPSTR pSymbolName;
-
- DPRINT((0,"REASON_PAGEFAULT\n"));
-
- if( ScanExportsByAddress(&pSymbolName,GetLinearAddress(CurrentCS,CurrentEIP)) )
- {
- PICE_sprintf(tempShell,"pICE: Breakpoint due to page fault at %.4X:%.8X (%s)\n",CurrentCS,CurrentEIP,pSymbolName);
- }
- else
- {
- PICE_sprintf(tempShell,"pICE: Breakpoint due to page fault at %.4X:%.8X\n",CurrentCS,CurrentEIP);
- }
- Print(OUTPUT_WINDOW,tempShell);
- PICE_sprintf(tempShell,"pICE: memory referenced %x\n",CurrentCR2);
- Print(OUTPUT_WINDOW,tempShell);
- dwCallOldIntEHandler = 1;
- }
- else if(dwReasonForBreak == REASON_GP_FAULT)
- {
- LPSTR pSymbolName;
-
- DPRINT((0,"REASON_GPFAULT\n"));
-
- if( ScanExportsByAddress(&pSymbolName,GetLinearAddress(CurrentCS,CurrentEIP)) )
- {
- PICE_sprintf(tempShell,"pICE: Breakpoint due to general protection fault at %.4X:%.8X (%s)\n",CurrentCS,CurrentEIP,pSymbolName);
- }
- else
- {
- PICE_sprintf(tempShell,"pICE: Breakpoint due to general protection fault at %.4X:%.8X\n",CurrentCS,CurrentEIP);
- }
- Print(OUTPUT_WINDOW,tempShell);
- dwCallOldGPFaultHandler = 1;
- }
- else if(dwReasonForBreak == REASON_CTRLF)
- {
- DPRINT((0,"REASON_CTRLF\n"));
- // nothing to do
- }
- else if(dwReasonForBreak == REASON_DOUBLE_FAULT)
- {
- DPRINT((0,"REASON_DOUBLE_FAULT\n"));
-
- PICE_sprintf(tempShell,"pICE: Breakpoint due to double fault at %.4X:%.8X\n",CurrentCS,CurrentEIP);
- Print(OUTPUT_WINDOW,tempShell);
- }
- else if(dwReasonForBreak == REASON_INTERNAL_ERROR)
- {
- DPRINT((0,"REASON_INTERNAL_ERROR\n"));
-
- Print(OUTPUT_WINDOW,"pICE: Please report this error to klauspg@diamondmm.com!\n");
-// Print(OUTPUT_WINDOW,"pICE: !!! SYSTEM HALTED !!!\n");
-// __asm__ __volatile__("hlt");
- }
- else
- {
- DPRINT((0,"REASON_UNKNOWN\n"));
-
- PICE_sprintf(tempShell,"pICE: Breakpoint due to unknown reason at %.4X:%.8X (code %x)\n",CurrentCS,CurrentEIP,dwReasonForBreak);
- Print(OUTPUT_WINDOW,tempShell);
- Print(OUTPUT_WINDOW,"pICE: Please report this error to klauspg@diamondmm.com!\n");
- Print(OUTPUT_WINDOW,"pICE: !!! SYSTEM HALTED !!!\n");
- __asm__ __volatile__("hlt");
- }
-
- // we don't single-step yet
- DPRINT((0,"RealIsr(): not stepping yet\n"));
- bSingleStep=FALSE;
-
- // process commands
- if(bSkipMainLoop == FALSE)
- {
- DPRINT((0,"RealIsr(): saving registers\n"));
- // save the extended regs
- __asm__ __volatile__
- ("\n\t \
- pushl %eax\n\t \
- movw %es,%ax\n\t \
- movw %ax,_CurrentES\n\t \
- //movw %fs,%ax\n\t \
- //movw %ax,_CurrentFS\n\t \
- movw %gs,%ax\n\t \
- movw %ax,_CurrentGS\n\t \
- movl %dr0,%eax\n\t \
- movl %eax,_CurrentDR0\n\t \
- movl %dr1,%eax\n\t \
- movl %eax,_CurrentDR1\n\t \
- movl %dr2,%eax\n\t \
- movl %eax,_CurrentDR2\n\t \
- movl %dr3,%eax\n\t \
- movl %eax,_CurrentDR3\n\t \
- movl %dr6,%eax\n\t \
- movl %eax,_CurrentDR6\n\t \
- movl %dr7,%eax\n\t \
- movl %eax,_CurrentDR7\n\t \
- movl %cr0,%eax\n\t \
- movl %eax,_CurrentCR0\n\t \
- movl %cr2,%eax\n\t \
- movl %eax,_CurrentCR2\n\t \
- movl %cr3,%eax\n\t \
- movl %eax,_CurrentCR3\n\t \
- popl %eax"
- );
-
- CurrentFS = OLD_PCR;
- DPRINT((0,"RealIsr(): adding colon to output()\n"));
- Print(OUTPUT_WINDOW,":");
-
- DPRINT((0,"RealIsr(): calling DebuggerShell()\n"));
- DebuggerShell();
- }
-
- // if there was a SW breakpoint at CS:EIP
- if(NeedToReInstallSWBreakpoints(GetLinearAddress(CurrentCS,CurrentEIP),TRUE) || ReinstallPermanentBp)
- {
- DPRINT((0,"need to reinstall INT3\n"));
- // remember how we restarted last time
- bPreviousCommandWasGo = !bSingleStep;
- // do a single step to reinstall breakpoint
- // modify trace flag
- CurrentEFL|=0x100; // set trace flag (TF)
-
- bSingleStep=TRUE;
- bNotifyToExit=TRUE;
- }
-
-common_return_point:
-
- // reset the global flags
- bNotifyToExit = FALSE;
- bSkipMainLoop = FALSE;
-
- // not in handler anymore
- bInDebuggerShell = FALSE;
-
- LEAVE_FUNC();
- DPRINT((0,"common return-----------------------------------------------------------------\n"));
-}
-
-
-__asm__(".global NewInt31Handler\n\t \
-NewInt31Handler:\n\t \
- cli\n\t \
- cld\n\t \
-\n\t \
- pushl %eax\n\t \
- pushl %ds\n\t \
-\n\t \
- movw %ss,%ax\n\t \
- mov %ax,%ds\n\t \
-\n\t \
- mov 0x4(%esp),%eax\n\t \
- movl %eax,_CurrentEAX\n\t \
- movl %ebx,_CurrentEBX\n\t \
- movl %ecx,_CurrentECX\n\t \
- movl %edx,_CurrentEDX\n\t \
- movl %esi,_CurrentESI\n\t \
- movl %edi,_CurrentEDI\n\t \
- movl %ebp,_CurrentEBP\n\t \
- movl (%esp),%eax\n\t \
- movw %ax,_CurrentDS\n\t \
-\n\t \
- // test for V86 mode\n\t \
- testl $0x20000,5*4(%esp)\n\t \
- jz notV86\n\t \
-\n\t \
- int $0x03\n\t \
-\n\t \
-notV86:\n\t \
- // test if stack switched (ring3->ring0 transition)\n\t \
- // stack is switched if orig. SS is not global kernel code segment\n\t \
- movl 4*4(%esp),%eax\n\t \
- cmpw $" STR(GLOBAL_CODE_SEGMENT) ",%ax\n\t \
- je notswitched\n\t \
-\n\t \
- // switched stack\n\t \
- movl 6*4(%esp),%eax\n\t \
- mov %eax,_CurrentESP\n\t \
- mov 7*4(%esp),%eax\n\t \
- movzwl %ax,%eax\n\t \
- mov %ax,_CurrentSS\n\t \
- jmp afterswitch\n\t \
-\n\t \
-notswitched:\n\t \
- // didn't switch stack\n\t \
- movl %esp,_CurrentESP\n\t \
- addl $24,_CurrentESP\n\t \
- movw %ss,%ax\n\t \
- movzwl %ax,%eax\n\t \
- mov %ax,_CurrentSS\n\t \
-\n\t \
-afterswitch:\n\t \
- // save EIP\n\t \
- mov 3*4(%esp),%eax\n\t \
- mov %eax,_CurrentEIP\n\t \
- //save CS\n\t \
- mov 4*4(%esp),%eax\n\t \
- movzwl %ax,%eax\n\t \
- movw %ax,_CurrentCS\n\t \
- // save flags\n\t \
- movl 5*4(%esp),%eax\n\t \
- andl $0xFFFFFEFF,%eax\n\t \
- movl %eax,_CurrentEFL\n\t \
-\n\t \
- pushal\n\t \
-\n\t \
- // get reason code\n\t \
- mov 0x28(%esp),%ebx\n\t \
-\n\t \
- /*\n\t \
- * Load the PCR selector.\n\t \
- */\n\t \
-\n\t \
- movl %fs, %eax\n\t \
- movl %eax, _OLD_PCR\n\t \
- movl _PCR_SEL, %eax\n\t \
- movl %eax, %fs\n\t \
-\n\t \
- // setup a large work stack\n\t \
- movl %esp,%eax\n\t \
- movl %eax,_ulRealStackPtr\n\t \
-\n\t \
- pushl %ebx\n\t \
- call _RealIsr\n\t \
- addl $4,%esp\n\t \
-\n\t \
- pushl %eax\n\t \
- movl _OLD_PCR, %eax\n\t \
- movl %eax, %fs\n\t \
- popl %eax\n\t \
-\n\t \
- // restore all regs\n\t \
- popal\n\t \
-\n\t \
- // do an EOI to IRQ controller (because we definitely pressed some key)\n\t \
- // TODO: SMP APIC support\n\t \
- movb $0x20,%al\n\t \
- outb %al,$0x20\n\t \
-\n\t \
- popl %ds\n\t \
- popl %eax\n\t \
-\n\t \
- // remove reason code\n\t \
- addl $4,%esp\n\t \
-\n\t \
- // make EAX available\n\t \
- pushl %eax\n\t \
-\n\t \
- // modify or restore EFLAGS\n\t \
- .byte 0x2e\n\t \
- mov _CurrentEFL,%eax\n\t \
- mov %eax,3*4(%esp)\n\t \
- .byte 0x2e\n\t \
- movzwl _CurrentCS,%eax\n\t \
- mov %eax,2*4(%esp)\n\t \
- .byte 0x2e\n\t \
- mov _CurrentEIP,%eax\n\t \
- mov %eax,1*4(%esp)\n\t \
-\n\t \
- // restore EAX\n\t \
- popl %eax\n\t \
-\n\t \
- // do we need to call old INT1 handler\n\t \
- .byte 0x2e\n\t \
- cmp $0,_dwCallOldInt1Handler\n\t \
- je do_iret2\n\t \
-\n\t \
- // call INT3 handler\n\t \
- .byte 0x2e\n\t \
- jmp *_OldInt1Handler\n\t \
-\n\t \
-do_iret2:\n\t \
- // do we need to call old INT3 handler\n\t \
- .byte 0x2e\n\t \
- cmp $0,_dwCallOldInt3Handler\n\t \
- je do_iret1\n\t \
-\n\t \
- // call INT3 handler\n\t \
- .byte 0x2e\n\t \
- jmp *_OldInt3Handler\n\t \
-\n\t \
-do_iret1:\n\t \
- // do we need to call old pagefault handler\n\t \
- .byte 0x2e\n\t \
- cmp $0,_dwCallOldIntEHandler\n\t \
- je do_iret3\n\t \
-\n\t \
- // call old pagefault handler\n\t \
- .byte 0x2e\n\t \
- pushl _error_code\n\t \
- .byte 0x2e\n\t \
- jmp *_OldIntEHandler\n\t \
-\n\t \
-do_iret3:\n\t \
- // do we need to call old general protection fault handler\n\t \
- .byte 0x2e\n\t \
- cmp $0,_dwCallOldGPFaultHandler\n\t \
- je do_iret\n\t \
-\n\t \
- // call old pagefault handler\n\t \
- .byte 0x2e\n\t \
- pushl _error_code\n\t \
- .byte 0x2e\n\t \
- jmp *_OldGPFaultHandler\n\t \
-\n\t \
-do_iret:\n\t \
- //ei\n\t \
- //int3\n\t \
- iretl ");
-
-//
-// stub for entering via CTRL-F
-//
-// IDTs keyboard IRQ points here
-//
-__asm__ ("\n\t \
-NewGlobalInt31Handler:\n\t \
- .byte 0x2e\n\t \
- cmpb $0,_bEnterNow\n\t \
- jne dotheenter\n\t \
-\n\t \
- // chain to old handler\n\t \
- .byte 0x2e\n\t \
- jmp *_OldGlobalInt31Handler\n\t \
-\n\t \
-dotheenter:\n\t \
- pushl $" STR(REASON_CTRLF) "\n\t \
- jmp NewInt31Handler "
-);
-
-void InstallGlobalKeyboardHook(void)
-{
- ULONG LocalNewGlobalInt31Handler;
-
- ENTER_FUNC();
-
- MaskIrqs();
- if(!OldGlobalInt31Handler)
- {
- __asm__("mov $NewGlobalInt31Handler,%0"
- :"=r" (LocalNewGlobalInt31Handler)
- :
- :"eax");
- OldGlobalInt31Handler=SetGlobalInt(KeyboardIRQL,(ULONG)LocalNewGlobalInt31Handler);
- }
- UnmaskIrqs();
-
- LEAVE_FUNC();
-}
-
-void DeInstallGlobalKeyboardHook(void)
-{
- ENTER_FUNC();
-
- MaskIrqs();
- if(OldGlobalInt31Handler)
- {
- SetGlobalInt(KeyboardIRQL,(ULONG)OldGlobalInt31Handler);
- OldGlobalInt31Handler=0;
- }
- UnmaskIrqs();
-
- LEAVE_FUNC();
-}
-
-
projects / reactos.git / blobdiff