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Sweden-Number/debugger/registers.c

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/*
* Debugger register handling
*
* Copyright 1995 Alexandre Julliard
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include "selectors.h"
#include "debugger.h"
CONTEXT DEBUG_context;
/***********************************************************************
* DEBUG_SetRegister
*
* Set a register value.
*/
void DEBUG_SetRegister( enum debug_regs reg, int val )
{
#ifdef __i386__
switch(reg)
{
case REG_EAX: EAX_reg(&DEBUG_context) = val; break;
case REG_EBX: EBX_reg(&DEBUG_context) = val; break;
case REG_ECX: ECX_reg(&DEBUG_context) = val; break;
case REG_EDX: EDX_reg(&DEBUG_context) = val; break;
case REG_ESI: ESI_reg(&DEBUG_context) = val; break;
case REG_EDI: EDI_reg(&DEBUG_context) = val; break;
case REG_EBP: EBP_reg(&DEBUG_context) = val; break;
case REG_EFL: EFL_reg(&DEBUG_context) = val; break;
case REG_EIP: EIP_reg(&DEBUG_context) = val; break;
case REG_ESP: ESP_reg(&DEBUG_context) = val; break;
case REG_CS: CS_reg(&DEBUG_context) = val; break;
case REG_DS: DS_reg(&DEBUG_context) = val; break;
case REG_ES: ES_reg(&DEBUG_context) = val; break;
case REG_SS: SS_reg(&DEBUG_context) = val; break;
case REG_FS: FS_reg(&DEBUG_context) = val; break;
case REG_GS: GS_reg(&DEBUG_context) = val; break;
case REG_AX: SET_LOWORD(EAX_reg(&DEBUG_context),val); break;
case REG_BX: SET_LOWORD(EBX_reg(&DEBUG_context),val); break;
case REG_CX: SET_LOWORD(ECX_reg(&DEBUG_context),val); break;
case REG_DX: SET_LOWORD(EDX_reg(&DEBUG_context),val); break;
case REG_SI: SET_LOWORD(ESI_reg(&DEBUG_context),val); break;
case REG_DI: SET_LOWORD(EDI_reg(&DEBUG_context),val); break;
case REG_BP: SET_LOWORD(EBP_reg(&DEBUG_context),val); break;
case REG_FL: SET_LOWORD(EFL_reg(&DEBUG_context),val); break;
case REG_IP: SET_LOWORD(EIP_reg(&DEBUG_context),val); break;
case REG_SP: SET_LOWORD(ESP_reg(&DEBUG_context),val); break;
}
#endif
}
int
DEBUG_PrintRegister(enum debug_regs reg)
{
#ifdef __i386__
switch(reg)
{
case REG_EAX: fprintf(stderr, "%%eax"); break;
case REG_EBX: fprintf(stderr, "%%ebx"); break;
case REG_ECX: fprintf(stderr, "%%ecx"); break;
case REG_EDX: fprintf(stderr, "%%edx"); break;
case REG_ESI: fprintf(stderr, "%%esi"); break;
case REG_EDI: fprintf(stderr, "%%edi"); break;
case REG_EBP: fprintf(stderr, "%%ebp"); break;
case REG_EFL: fprintf(stderr, "%%efl"); break;
case REG_EIP: fprintf(stderr, "%%eip"); break;
case REG_ESP: fprintf(stderr, "%%esp"); break;
case REG_AX: fprintf(stderr, "%%ax"); break;
case REG_BX: fprintf(stderr, "%%bx"); break;
case REG_CX: fprintf(stderr, "%%cx"); break;
case REG_DX: fprintf(stderr, "%%dx"); break;
case REG_SI: fprintf(stderr, "%%si"); break;
case REG_DI: fprintf(stderr, "%%di"); break;
case REG_BP: fprintf(stderr, "%%bp"); break;
case REG_FL: fprintf(stderr, "%%fl"); break;
case REG_IP: fprintf(stderr, "%%ip"); break;
case REG_SP: fprintf(stderr, "%%sp"); break;
case REG_CS: fprintf(stderr, "%%cs"); break;
case REG_DS: fprintf(stderr, "%%ds"); break;
case REG_ES: fprintf(stderr, "%%es"); break;
case REG_SS: fprintf(stderr, "%%ss"); break;
case REG_FS: fprintf(stderr, "%%fs"); break;
case REG_GS: fprintf(stderr, "%%gs"); break;
}
return TRUE;
#else
return FALSE;
#endif
}
/***********************************************************************
* DEBUG_GetRegister
*
* Get a register value.
*/
int DEBUG_GetRegister( enum debug_regs reg )
{
#ifdef __i386__
switch(reg)
{
case REG_EAX: return EAX_reg(&DEBUG_context);
case REG_EBX: return EBX_reg(&DEBUG_context);
case REG_ECX: return ECX_reg(&DEBUG_context);
case REG_EDX: return EDX_reg(&DEBUG_context);
case REG_ESI: return ESI_reg(&DEBUG_context);
case REG_EDI: return EDI_reg(&DEBUG_context);
case REG_EBP: return EBP_reg(&DEBUG_context);
case REG_EFL: return EFL_reg(&DEBUG_context);
case REG_EIP: return EIP_reg(&DEBUG_context);
case REG_ESP: return ESP_reg(&DEBUG_context);
case REG_CS: return CS_reg(&DEBUG_context);
case REG_DS: return DS_reg(&DEBUG_context);
case REG_ES: return ES_reg(&DEBUG_context);
case REG_SS: return SS_reg(&DEBUG_context);
case REG_FS: return FS_reg(&DEBUG_context);
case REG_GS: return GS_reg(&DEBUG_context);
case REG_AX: return LOWORD(EAX_reg(&DEBUG_context));
case REG_BX: return LOWORD(EBX_reg(&DEBUG_context));
case REG_CX: return LOWORD(ECX_reg(&DEBUG_context));
case REG_DX: return LOWORD(EDX_reg(&DEBUG_context));
case REG_SI: return LOWORD(ESI_reg(&DEBUG_context));
case REG_DI: return LOWORD(EDI_reg(&DEBUG_context));
case REG_BP: return LOWORD(EBP_reg(&DEBUG_context));
case REG_FL: return LOWORD(EFL_reg(&DEBUG_context));
case REG_IP: return LOWORD(EIP_reg(&DEBUG_context));
case REG_SP: return LOWORD(ESP_reg(&DEBUG_context));
}
#endif
return 0; /* should not happen */
}
/***********************************************************************
* DEBUG_Flags
*
* Return Flag String.
*/
char *DEBUG_Flags( DWORD flag, char *buf )
{
char *pt;
strcpy( buf, " - 00 - - - " );
pt = buf + strlen( buf );
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000001 ) *pt = 'C'; /* Carry Falg */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000002 ) *pt = '1';
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000004 ) *pt = 'P'; /* Parity Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000008 ) *pt = '-';
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000010 ) *pt = 'A'; /* Auxiliary Carry Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000020 ) *pt = '-';
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000040 ) *pt = 'Z'; /* Zero Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000080 ) *pt = 'S'; /* Sign Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000100 ) *pt = 'T'; /* Trap/Trace Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000200 ) *pt = 'I'; /* Interupt Enable Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000400 ) *pt = 'D'; /* Direction Indicator */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00000800 ) *pt = 'O'; /* Overflow Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00001000 ) *pt = '1'; /* I/O Privilage Level */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00002000 ) *pt = '1'; /* I/O Privilage Level */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00004000 ) *pt = 'N'; /* Nested Task Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00008000 ) *pt = '-';
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00010000 ) *pt = 'R'; /* Resume Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00020000 ) *pt = 'V'; /* Vritual Mode Flag */
if ( buf >= pt-- ) return( buf );
if ( flag & 0x00040000 ) *pt = 'a'; /* Alignment Check Flag */
if ( buf >= pt-- ) return( buf );
return( buf );
}
/***********************************************************************
* DEBUG_InfoRegisters
*
* Display registers information.
*/
void DEBUG_InfoRegisters(void)
{
fprintf(stderr,"Register dump:\n");
#ifdef __i386__
/* First get the segment registers out of the way */
fprintf( stderr," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
(WORD)CS_reg(&DEBUG_context), (WORD)SS_reg(&DEBUG_context),
(WORD)DS_reg(&DEBUG_context), (WORD)ES_reg(&DEBUG_context),
(WORD)FS_reg(&DEBUG_context), (WORD)GS_reg(&DEBUG_context) );
if (dbg_mode == 16)
{
char flag[33];
fprintf( stderr,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
LOWORD(EIP_reg(&DEBUG_context)), LOWORD(ESP_reg(&DEBUG_context)),
LOWORD(EBP_reg(&DEBUG_context)), LOWORD(EFL_reg(&DEBUG_context)),
DEBUG_Flags(LOWORD(EFL_reg(&DEBUG_context)), flag));
fprintf( stderr," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
AX_reg(&DEBUG_context), BX_reg(&DEBUG_context),
CX_reg(&DEBUG_context), DX_reg(&DEBUG_context),
SI_reg(&DEBUG_context), DI_reg(&DEBUG_context) );
}
else /* 32-bit mode */
{
char flag[33];
fprintf( stderr, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
EIP_reg(&DEBUG_context), ESP_reg(&DEBUG_context),
EBP_reg(&DEBUG_context), EFL_reg(&DEBUG_context),
DEBUG_Flags(EFL_reg(&DEBUG_context), flag));
fprintf( stderr, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
EAX_reg(&DEBUG_context), EBX_reg(&DEBUG_context),
ECX_reg(&DEBUG_context), EDX_reg(&DEBUG_context) );
fprintf( stderr, " ESI:%08lx EDI:%08lx\n",
ESI_reg(&DEBUG_context), EDI_reg(&DEBUG_context) );
}
#endif
}
/***********************************************************************
* DEBUG_ValidateRegisters
*
* Make sure all registers have a correct value for returning from
* the signal handler.
*/
BOOL DEBUG_ValidateRegisters(void)
{
#ifdef __i386__
WORD cs, ds;
if (ISV86(&DEBUG_context)) return TRUE;
/* Check that a selector is a valid ring-3 LDT selector, or a NULL selector */
#define CHECK_SEG(seg,name) \
if (((seg) & ~3) && \
((((seg) & 7) != 7) || IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(seg)))) \
{ \
fprintf( stderr, "*** Invalid value for %s register: %04x\n", \
(name), (WORD)(seg) ); \
return FALSE; \
}
cs = __get_cs();
ds = __get_ds();
if (CS_reg(&DEBUG_context) != cs) CHECK_SEG(CS_reg(&DEBUG_context), "CS");
if (SS_reg(&DEBUG_context) != ds) CHECK_SEG(SS_reg(&DEBUG_context), "SS");
if (DS_reg(&DEBUG_context) != ds) CHECK_SEG(DS_reg(&DEBUG_context), "DS");
if (ES_reg(&DEBUG_context) != ds) CHECK_SEG(ES_reg(&DEBUG_context), "ES");
if (FS_reg(&DEBUG_context) != ds) CHECK_SEG(FS_reg(&DEBUG_context), "FS");
if (GS_reg(&DEBUG_context) != ds) CHECK_SEG(GS_reg(&DEBUG_context), "GS");
/* Check that CS and SS are not NULL */
if (!ISV86(&DEBUG_context))
if (!(CS_reg(&DEBUG_context) & ~3))
{
fprintf( stderr, "*** Invalid value for CS register: %04x\n",
(WORD)CS_reg(&DEBUG_context) );
return FALSE;
}
if (!(SS_reg(&DEBUG_context) & ~3))
{
fprintf( stderr, "*** Invalid value for SS register: %04x\n",
(WORD)SS_reg(&DEBUG_context) );
return FALSE;
}
return TRUE;
#undef CHECK_SEG
#else
return TRUE;
#endif
}
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