187 lines
6.5 KiB
C
187 lines
6.5 KiB
C
/*
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* Debugger register handling
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*
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* Copyright 1995 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <string.h>
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#include "debugger.h"
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/***********************************************************************
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* DEBUG_Flags
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*
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* Return Flag String.
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*/
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char *DEBUG_Flags( DWORD flag, char *buf )
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{
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#ifdef __i386__
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char *pt;
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strcpy( buf, " - 00 - - - " );
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pt = buf + strlen( buf );
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000001 ) *pt = 'C'; /* Carry Falg */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000002 ) *pt = '1';
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000004 ) *pt = 'P'; /* Parity Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000008 ) *pt = '-';
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000010 ) *pt = 'A'; /* Auxiliary Carry Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000020 ) *pt = '-';
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000040 ) *pt = 'Z'; /* Zero Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000080 ) *pt = 'S'; /* Sign Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000100 ) *pt = 'T'; /* Trap/Trace Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000200 ) *pt = 'I'; /* Interupt Enable Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000400 ) *pt = 'D'; /* Direction Indicator */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00000800 ) *pt = 'O'; /* Overflow Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00001000 ) *pt = '1'; /* I/O Privilage Level */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00002000 ) *pt = '1'; /* I/O Privilage Level */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00004000 ) *pt = 'N'; /* Nested Task Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00008000 ) *pt = '-';
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00010000 ) *pt = 'R'; /* Resume Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00020000 ) *pt = 'V'; /* Vritual Mode Flag */
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if ( buf >= pt-- ) return( buf );
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if ( flag & 0x00040000 ) *pt = 'a'; /* Alignment Check Flag */
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if ( buf >= pt-- ) return( buf );
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return( buf );
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#else
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strcpy(buf, "unknown CPU");
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return buf;
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#endif
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}
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/***********************************************************************
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* DEBUG_InfoRegisters
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*
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* Display registers information.
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*/
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void DEBUG_InfoRegisters(void)
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{
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DEBUG_Printf(DBG_CHN_MESG,"Register dump:\n");
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#ifdef __i386__
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/* First get the segment registers out of the way */
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DEBUG_Printf( DBG_CHN_MESG," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
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(WORD)DEBUG_context.SegCs, (WORD)DEBUG_context.SegSs,
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(WORD)DEBUG_context.SegDs, (WORD)DEBUG_context.SegEs,
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(WORD)DEBUG_context.SegFs, (WORD)DEBUG_context.SegGs );
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if (DEBUG_CurrThread->dbg_mode != MODE_32)
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{
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char flag[33];
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DEBUG_Printf( DBG_CHN_MESG,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
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LOWORD(DEBUG_context.Eip), LOWORD(DEBUG_context.Esp),
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LOWORD(DEBUG_context.Ebp), LOWORD(DEBUG_context.EFlags),
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DEBUG_Flags(LOWORD(DEBUG_context.EFlags), flag));
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DEBUG_Printf( DBG_CHN_MESG," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
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LOWORD(DEBUG_context.Eax), LOWORD(DEBUG_context.Ebx),
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LOWORD(DEBUG_context.Ecx), LOWORD(DEBUG_context.Edx),
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LOWORD(DEBUG_context.Esi), LOWORD(DEBUG_context.Edi) );
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}
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else /* 32-bit mode */
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{
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char flag[33];
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DEBUG_Printf( DBG_CHN_MESG, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
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DEBUG_context.Eip, DEBUG_context.Esp,
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DEBUG_context.Ebp, DEBUG_context.EFlags,
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DEBUG_Flags(DEBUG_context.EFlags, flag));
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DEBUG_Printf( DBG_CHN_MESG, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
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DEBUG_context.Eax, DEBUG_context.Ebx,
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DEBUG_context.Ecx, DEBUG_context.Edx );
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DEBUG_Printf( DBG_CHN_MESG, " ESI:%08lx EDI:%08lx\n",
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DEBUG_context.Esi, DEBUG_context.Edi );
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}
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#endif
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}
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/***********************************************************************
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* DEBUG_ValidateRegisters
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*
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* Make sure all registers have a correct value for returning from
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* the signal handler.
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*/
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BOOL DEBUG_ValidateRegisters(void)
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{
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DBG_ADDR addr;
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char ch;
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#ifdef __i386__
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if (DEBUG_context.EFlags & V86_FLAG) return TRUE;
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#if 0
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/* Check that a selector is a valid ring-3 LDT selector, or a NULL selector */
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#define CHECK_SEG(seg,name) \
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if (((seg) & ~3) && ((((seg) & 7) != 7) || !DEBUG_IsSelector(seg))) { \
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DEBUG_Printf( DBG_CHN_MESG, "*** Invalid value for %s register: %04x\n", \
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(name), (WORD)(seg) ); \
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return FALSE; \
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}
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cs = __get_cs();
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ds = __get_ds();
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if (DEBUG_context.SegCs != cs) CHECK_SEG(DEBUG_context.SegCs, "CS");
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if (DEBUG_context.SegSs != ds) CHECK_SEG(DEBUG_context.SegSs, "SS");
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if (DEBUG_context.SegDs != ds) CHECK_SEG(DEBUG_context.SegDs, "DS");
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if (DEBUG_context.SegEs != ds) CHECK_SEG(DEBUG_context.SegEs, "ES");
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if (DEBUG_context.SegFs != ds) CHECK_SEG(DEBUG_context.SegFs, "FS");
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if (DEBUG_context.SegGs != ds) CHECK_SEG(DEBUG_context.SegGs, "GS");
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#endif
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/* Check that CS and SS are not NULL */
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if (!(DEBUG_context.SegCs & ~3))
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{
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DEBUG_Printf( DBG_CHN_MESG, "*** Invalid value for CS register: %04x\n",
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(WORD)DEBUG_context.SegCs );
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return FALSE;
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}
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if (!(DEBUG_context.SegSs & ~3))
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{
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DEBUG_Printf( DBG_CHN_MESG, "*** Invalid value for SS register: %04x\n",
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(WORD)DEBUG_context.SegSs );
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return FALSE;
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}
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#undef CHECK_SEG
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#else
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/* to be written */
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#endif
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/* check if PC is correct */
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DEBUG_GetCurrentAddress(&addr);
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return DEBUG_READ_MEM_VERBOSE((void*)DEBUG_ToLinear(&addr), &ch, 1);
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}
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