tuiregs.c

gdb-6.0 linux 下的调试工具

/* TUI display registers in window.

   Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
   Inc.

   Contributed by Hewlett-Packard Company.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "tui.h"
#include "tuiData.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
#include "frame.h"
#include "regcache.h"
#include "inferior.h"
#include "target.h"
#include "tuiLayout.h"
#include "tuiWin.h"
#include "tuiDataWin.h"
#include "tuiGeneralWin.h"
#include "tui-file.h"

#ifdef HAVE_NCURSES_H       
#include <ncurses.h>
#else
#ifdef HAVE_CURSES_H
#include <curses.h>
#endif
#endif

/*****************************************
** LOCAL DEFINITIONS                    **
******************************************/
#define DOUBLE_FLOAT_LABEL_WIDTH    6
#define DOUBLE_FLOAT_LABEL_FMT      "%6.6s: "
#define DOUBLE_FLOAT_VALUE_WIDTH    30	/*min of 16 but may be in sci notation */

#define SINGLE_FLOAT_LABEL_WIDTH    6
#define SINGLE_FLOAT_LABEL_FMT      "%6.6s: "
#define SINGLE_FLOAT_VALUE_WIDTH    25	/* min of 8 but may be in sci notation */

#define SINGLE_LABEL_WIDTH    16
#define SINGLE_LABEL_FMT      "%10.10s: "
#define SINGLE_VALUE_WIDTH    20 /* minimum of 8 but may be in sci notation */

/* In the code HP gave Cygnus, this was actually a function call to a
   PA-specific function, which was supposed to determine whether the
   target was a 64-bit or 32-bit processor.  However, the 64-bit
   support wasn't complete, so we didn't merge that in, so we leave
   this here as a stub.  */
#define IS_64BIT 0

/*****************************************
** STATIC DATA                          **
******************************************/


/*****************************************
** STATIC LOCAL FUNCTIONS FORWARD DECLS    **
******************************************/
static TuiStatus _tuiSetRegsContent
  (int, int, struct frame_info *, TuiRegisterDisplayType, int);
static const char *_tuiRegisterName (int);
static TuiStatus _tuiGetRegisterRawValue (int, char *, struct frame_info *);
static void _tuiSetRegisterElement
  (int, struct frame_info *, TuiDataElementPtr, int);
static void _tuiDisplayRegister (int, TuiGenWinInfoPtr, enum precision_type);
static void _tuiRegisterFormat
  (char *, int, int, TuiDataElementPtr, enum precision_type);
static TuiStatus _tuiSetGeneralRegsContent (int);
static TuiStatus _tuiSetSpecialRegsContent (int);
static TuiStatus _tuiSetGeneralAndSpecialRegsContent (int);
static TuiStatus _tuiSetFloatRegsContent (TuiRegisterDisplayType, int);
static int _tuiRegValueHasChanged
  (TuiDataElementPtr, struct frame_info *, char *);
static void _tuiShowFloat_command (char *, int);
static void _tuiShowGeneral_command (char *, int);
static void _tuiShowSpecial_command (char *, int);
static void _tui_vShowRegisters_commandSupport (TuiRegisterDisplayType);
static void _tuiToggleFloatRegs_command (char *, int);
static void _tuiScrollRegsForward_command (char *, int);
static void _tuiScrollRegsBackward_command (char *, int);



/*****************************************
** PUBLIC FUNCTIONS                     **
******************************************/

/*
   ** tuiLastRegsLineNo()
   **        Answer the number of the last line in the regs display.
   **        If there are no registers (-1) is returned.
 */
int
tuiLastRegsLineNo (void)
{
  register int numLines = (-1);

  if (dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      numLines = (dataWin->detail.dataDisplayInfo.regsContentCount /
		  dataWin->detail.dataDisplayInfo.regsColumnCount);
      if (dataWin->detail.dataDisplayInfo.regsContentCount %
	  dataWin->detail.dataDisplayInfo.regsColumnCount)
	numLines++;
    }
  return numLines;
}				/* tuiLastRegsLineNo */


/*
   ** tuiLineFromRegElementNo()
   **        Answer the line number that the register element at elementNo is
   **        on.  If elementNo is greater than the number of register elements
   **        there are, -1 is returned.
 */
int
tuiLineFromRegElementNo (int elementNo)
{
  if (elementNo < dataWin->detail.dataDisplayInfo.regsContentCount)
    {
      int i, line = (-1);

      i = 1;
      while (line == (-1))
	{
	  if (elementNo <
	      (dataWin->detail.dataDisplayInfo.regsColumnCount * i))
	    line = i - 1;
	  else
	    i++;
	}

      return line;
    }
  else
    return (-1);
}				/* tuiLineFromRegElementNo */


/*
   ** tuiFirstRegElementNoInLine()
   **        Answer the index of the first element in lineNo.  If lineNo is
   **        past the register area (-1) is returned.
 */
int
tuiFirstRegElementNoInLine (int lineNo)
{
  if ((lineNo * dataWin->detail.dataDisplayInfo.regsColumnCount)
      <= dataWin->detail.dataDisplayInfo.regsContentCount)
    return ((lineNo + 1) *
	    dataWin->detail.dataDisplayInfo.regsColumnCount) -
      dataWin->detail.dataDisplayInfo.regsColumnCount;
  else
    return (-1);
}				/* tuiFirstRegElementNoInLine */


/*
   ** tuiLastRegElementNoInLine()
   **        Answer the index of the last element in lineNo.  If lineNo is past
   **        the register area (-1) is returned.
 */
int
tuiLastRegElementNoInLine (int lineNo)
{
  if ((lineNo * dataWin->detail.dataDisplayInfo.regsColumnCount) <=
      dataWin->detail.dataDisplayInfo.regsContentCount)
    return ((lineNo + 1) *
	    dataWin->detail.dataDisplayInfo.regsColumnCount) - 1;
  else
    return (-1);
}				/* tuiLastRegElementNoInLine */


/*
   ** tuiCalculateRegsColumnCount
   **        Calculate the number of columns that should be used to display
   **        the registers.
 */
int
tuiCalculateRegsColumnCount (TuiRegisterDisplayType dpyType)
{
  int colCount, colWidth;

  if (IS_64BIT || dpyType == TUI_DFLOAT_REGS)
    colWidth = DOUBLE_FLOAT_VALUE_WIDTH + DOUBLE_FLOAT_LABEL_WIDTH;
  else
    {
      if (dpyType == TUI_SFLOAT_REGS)
	colWidth = SINGLE_FLOAT_VALUE_WIDTH + SINGLE_FLOAT_LABEL_WIDTH;
      else
	colWidth = SINGLE_VALUE_WIDTH + SINGLE_LABEL_WIDTH;
    }
  colCount = (dataWin->generic.width - 2) / colWidth;

  return colCount;
}				/* tuiCalulateRegsColumnCount */


/*
   ** tuiShowRegisters().
   **        Show the registers int the data window as indicated by dpyType.
   **        If there is any other registers being displayed, then they are
   **        cleared.  What registers are displayed is dependent upon dpyType.
 */
void
tuiShowRegisters (TuiRegisterDisplayType dpyType)
{
  TuiStatus ret = TUI_FAILURE;
  int refreshValuesOnly = FALSE;

  /* Say that registers should be displayed, even if there is a problem */
  dataWin->detail.dataDisplayInfo.displayRegs = TRUE;

  if (target_has_registers)
    {
      refreshValuesOnly =
	(dpyType == dataWin->detail.dataDisplayInfo.regsDisplayType);
      switch (dpyType)
	{
	case TUI_GENERAL_REGS:
	  ret = _tuiSetGeneralRegsContent (refreshValuesOnly);
	  break;
	case TUI_SFLOAT_REGS:
	case TUI_DFLOAT_REGS:
	  ret = _tuiSetFloatRegsContent (dpyType, refreshValuesOnly);
	  break;

/* could ifdef out */

	case TUI_SPECIAL_REGS:
	  ret = _tuiSetSpecialRegsContent (refreshValuesOnly);
	  break;
	case TUI_GENERAL_AND_SPECIAL_REGS:
	  ret = _tuiSetGeneralAndSpecialRegsContent (refreshValuesOnly);
	  break;

/* end of potential if def */

	default:
	  break;
	}
    }
  if (ret == TUI_FAILURE)
    {
      dataWin->detail.dataDisplayInfo.regsDisplayType = TUI_UNDEFINED_REGS;
      tuiEraseDataContent (NO_REGS_STRING);
    }
  else
    {
      int i;

      /* Clear all notation of changed values */
      for (i = 0; (i < dataWin->detail.dataDisplayInfo.regsContentCount); i++)
	{
	  TuiGenWinInfoPtr dataItemWin;

	  dataItemWin = &dataWin->detail.dataDisplayInfo.
	    regsContent[i]->whichElement.dataWindow;
	  (&((TuiWinElementPtr)
	     dataItemWin->content[0])->whichElement.data)->highlight = FALSE;
	}
      dataWin->detail.dataDisplayInfo.regsDisplayType = dpyType;
      tuiDisplayAllData ();
    }
  (tuiLayoutDef ())->regsDisplayType = dpyType;

  return;
}				/* tuiShowRegisters */


/*
   ** tuiDisplayRegistersFrom().
   **        Function to display the registers in the content from
   **        'startElementNo' until the end of the register content or the
   **        end of the display height.  No checking for displaying past
   **        the end of the registers is done here.
 */
void
tuiDisplayRegistersFrom (int startElementNo)
{
  if (dataWin->detail.dataDisplayInfo.regsContent != (TuiWinContent) NULL &&
      dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      register int i = startElementNo;
      int j, valueCharsWide, itemWinWidth, curY, labelWidth;
      enum precision_type precision;

      precision = (dataWin->detail.dataDisplayInfo.regsDisplayType
		   == TUI_DFLOAT_REGS) ?
	double_precision : unspecified_precision;
      if (IS_64BIT ||
	  dataWin->detail.dataDisplayInfo.regsDisplayType == TUI_DFLOAT_REGS)
	{
	  valueCharsWide = DOUBLE_FLOAT_VALUE_WIDTH;
	  labelWidth = DOUBLE_FLOAT_LABEL_WIDTH;
	}
      else
	{
	  if (dataWin->detail.dataDisplayInfo.regsDisplayType ==
	      TUI_SFLOAT_REGS)
	    {
	      valueCharsWide = SINGLE_FLOAT_VALUE_WIDTH;
	      labelWidth = SINGLE_FLOAT_LABEL_WIDTH;
	    }
	  else
	    {
	      valueCharsWide = SINGLE_VALUE_WIDTH;
	      labelWidth = SINGLE_LABEL_WIDTH;
	    }
	}
      itemWinWidth = valueCharsWide + labelWidth;
      /*
         ** Now create each data "sub" window, and write the display into it.
       */
      curY = 1;
      while (i < dataWin->detail.dataDisplayInfo.regsContentCount &&
	     curY <= dataWin->generic.viewportHeight)
	{
	  for (j = 0;
	       (j < dataWin->detail.dataDisplayInfo.regsColumnCount &&
		i < dataWin->detail.dataDisplayInfo.regsContentCount); j++)
	    {
	      TuiGenWinInfoPtr dataItemWin;
	      TuiDataElementPtr dataElementPtr;

	      /* create the window if necessary */
	      dataItemWin = &dataWin->detail.dataDisplayInfo.
		regsContent[i]->whichElement.dataWindow;
	      dataElementPtr = &((TuiWinElementPtr)
				 dataItemWin->content[0])->whichElement.data;
	      if (dataItemWin->handle == (WINDOW *) NULL)
		{
		  dataItemWin->height = 1;
		  dataItemWin->width = (precision == double_precision) ?
		    itemWinWidth + 2 : itemWinWidth + 1;
		  dataItemWin->origin.x = (itemWinWidth * j) + 1;
		  dataItemWin->origin.y = curY;
		  makeWindow (dataItemWin, DONT_BOX_WINDOW);
                  scrollok (dataItemWin->handle, FALSE);
		}
              touchwin (dataItemWin->handle);

	      /*
	         ** Get the printable representation of the register
	         ** and display it
	       */
	      _tuiDisplayRegister (
			    dataElementPtr->itemNo, dataItemWin, precision);
	      i++;		/* next register */
	    }
	  curY++;		/* next row; */
	}
    }

  return;
}				/* tuiDisplayRegistersFrom */


/*
   ** tuiDisplayRegElementAtLine().
   **        Function to display the registers in the content from
   **        'startElementNo' on 'startLineNo' until the end of the
   **        register content or the end of the display height.
   **        This function checks that we won't display off the end
   **        of the register display.
 */
void
tuiDisplayRegElementAtLine (int startElementNo, int startLineNo)
{
  if (dataWin->detail.dataDisplayInfo.regsContent != (TuiWinContent) NULL &&
      dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      register int elementNo = startElementNo;

      if (startElementNo != 0 && startLineNo != 0)
	{
	  register int lastLineNo, firstLineOnLastPage;

	  lastLineNo = tuiLastRegsLineNo ();
	  firstLineOnLastPage = lastLineNo - (dataWin->generic.height - 2);
	  if (firstLineOnLastPage < 0)
	    firstLineOnLastPage = 0;
	  /*
	     ** If there is no other data displayed except registers,
	     ** and the elementNo causes us to scroll past the end of the
	     ** registers, adjust what element to really start the display at.
	   */
	  if (dataWin->detail.dataDisplayInfo.dataContentCount <= 0 &&
	      startLineNo > firstLineOnLastPage)
	    elementNo = tuiFirstRegElementNoInLine (firstLineOnLastPage);
	}
      tuiDisplayRegistersFrom (elementNo);
    }

  return;
}				/* tuiDisplayRegElementAtLine */



/*
   ** tuiDisplayRegistersFromLine().
   **        Function to display the registers starting at line lineNo in
   **        the data window.  Answers the line number that the display
   **        actually started from.  If nothing is displayed (-1) is returned.
 */
int
tuiDisplayRegistersFromLine (int lineNo, int forceDisplay)
{
  if (dataWin->detail.dataDisplayInfo.regsContentCount > 0)
    {
      int line, elementNo;

      if (lineNo < 0)
	line = 0;
      else if (forceDisplay)
	{			/*
				   ** If we must display regs (forceDisplay is true), then make
				   ** sure that we don't display off the end of the registers.
				 */
	  if (lineNo >= tuiLastRegsLineNo ())
	    {
	      if ((line = tuiLineFromRegElementNo (
		 dataWin->detail.dataDisplayInfo.regsContentCount - 1)) < 0)
		line = 0;
	    }
	  else
	    line = lineNo;
	}
      else
	line = lineNo;

      elementNo = tuiFirstRegElementNoInLine (line);
      if (elementNo < dataWin->detail.dataDisplayInfo.regsContentCount)
	tuiDisplayRegElementAtLine (elementNo, line);
      else
	line = (-1);

      return line;
    }

  return (-1);			/* nothing was displayed */
}				/* tuiDisplayRegistersFromLine */


/*
   ** tuiCheckRegisterValues()
   **        This function check all displayed registers for changes in
   **        values, given a particular frame.  If the values have changed,
   **        they are updated with the new value and highlighted.
 */
void
tuiCheckRegisterValues (struct frame_info *frame)
{
  if (m_winPtrNotNull (dataWin) && dataWin->generic.isVisible)
    {
      if (dataWin->detail.dataDisplayInfo.regsContentCount <= 0 &&
	  dataWin->detail.dataDisplayInfo.displayRegs)
	tuiShowRegisters ((tuiLayoutDef ())->regsDisplayType);
      else
	{
	  int i, j;
	  char rawBuf[MAX_REGISTER_SIZE];

	  for (i = 0;
	       (i < dataWin->detail.dataDisplayInfo.regsContentCount); i++)
	    {
	      TuiDataElementPtr dataElementPtr;
	      TuiGenWinInfoPtr dataItemWinPtr;
	      int wasHilighted;

	      dataItemWinPtr = &dataWin->detail.dataDisplayInfo.
		regsContent[i]->whichElement.dataWindow;
	      dataElementPtr = &((TuiWinElementPtr)
			     dataItemWinPtr->content[0])->whichElement.data;
	      wasHilighted = dataElementPtr->highlight;
	      dataElementPtr->highlight =
		_tuiRegValueHasChanged (dataElementPtr, frame, &rawBuf[0]);
	      if (dataElementPtr->highlight)
		{
                  int size;

                  size = REGISTER_RAW_SIZE (dataElementPtr->itemNo);
		  for (j = 0; j < size; j++)
		    ((char *) dataElementPtr->value)[j] = rawBuf[j];
		  _tuiDisplayRegister (
					dataElementPtr->itemNo,
					dataItemWinPtr,
			((dataWin->detail.dataDisplayInfo.regsDisplayType ==
			  TUI_DFLOAT_REGS) ?
			 double_precision : unspecified_precision));
		}
	      else if (wasHilighted)
		{
		  dataElementPtr->highlight = FALSE;
		  _tuiDisplayRegister (
					dataElementPtr->itemNo,
					dataItemWinPtr,
			((dataWin->detail.dataDisplayInfo.regsDisplayType ==
			  TUI_DFLOAT_REGS) ?
			 double_precision : unspecified_precision));
		}
	    }
	}