247 lines
9.2 KiB
C
247 lines
9.2 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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#include <stdio.h>
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#include "debugger.h"
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CONTEXT DEBUG_context;
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/***********************************************************************
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* DEBUG_SetRegister
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*
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* Set a register value.
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*/
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void DEBUG_SetRegister( enum debug_regs reg, int val )
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{
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switch(reg)
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{
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case REG_EAX: EAX_reg(&DEBUG_context) = val; break;
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case REG_EBX: EBX_reg(&DEBUG_context) = val; break;
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case REG_ECX: ECX_reg(&DEBUG_context) = val; break;
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case REG_EDX: EDX_reg(&DEBUG_context) = val; break;
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case REG_ESI: ESI_reg(&DEBUG_context) = val; break;
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case REG_EDI: EDI_reg(&DEBUG_context) = val; break;
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case REG_EBP: EBP_reg(&DEBUG_context) = val; break;
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case REG_EFL: EFL_reg(&DEBUG_context) = val; break;
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case REG_EIP: EIP_reg(&DEBUG_context) = val; break;
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case REG_ESP: ESP_reg(&DEBUG_context) = val; break;
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case REG_AX: AX_reg(&DEBUG_context) = val; break;
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case REG_BX: BX_reg(&DEBUG_context) = val; break;
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case REG_CX: CX_reg(&DEBUG_context) = val; break;
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case REG_DX: DX_reg(&DEBUG_context) = val; break;
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case REG_SI: SI_reg(&DEBUG_context) = val; break;
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case REG_DI: DI_reg(&DEBUG_context) = val; break;
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case REG_BP: BP_reg(&DEBUG_context) = val; break;
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case REG_FL: FL_reg(&DEBUG_context) = val; break;
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case REG_IP: IP_reg(&DEBUG_context) = val; break;
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case REG_SP: SP_reg(&DEBUG_context) = val; break;
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case REG_CS: CS_reg(&DEBUG_context) = val; break;
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case REG_DS: DS_reg(&DEBUG_context) = val; break;
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case REG_ES: ES_reg(&DEBUG_context) = val; break;
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case REG_SS: SS_reg(&DEBUG_context) = val; break;
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case REG_FS: FS_reg(&DEBUG_context) = val; break;
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case REG_GS: GS_reg(&DEBUG_context) = val; break;
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}
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}
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/***********************************************************************
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* DEBUG_GetRegister
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*
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* Get a register value.
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*/
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int DEBUG_GetRegister( enum debug_regs reg )
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{
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switch(reg)
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{
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case REG_EAX: return EAX_reg(&DEBUG_context);
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case REG_EBX: return EBX_reg(&DEBUG_context);
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case REG_ECX: return ECX_reg(&DEBUG_context);
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case REG_EDX: return EDX_reg(&DEBUG_context);
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case REG_ESI: return ESI_reg(&DEBUG_context);
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case REG_EDI: return EDI_reg(&DEBUG_context);
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case REG_EBP: return EBP_reg(&DEBUG_context);
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case REG_EFL: return EFL_reg(&DEBUG_context);
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case REG_EIP: return EIP_reg(&DEBUG_context);
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case REG_ESP: return ESP_reg(&DEBUG_context);
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case REG_AX: return AX_reg(&DEBUG_context);
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case REG_BX: return BX_reg(&DEBUG_context);
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case REG_CX: return CX_reg(&DEBUG_context);
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case REG_DX: return DX_reg(&DEBUG_context);
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case REG_SI: return SI_reg(&DEBUG_context);
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case REG_DI: return DI_reg(&DEBUG_context);
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case REG_BP: return BP_reg(&DEBUG_context);
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case REG_FL: return FL_reg(&DEBUG_context);
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case REG_IP: return IP_reg(&DEBUG_context);
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case REG_SP: return SP_reg(&DEBUG_context);
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case REG_CS: return CS_reg(&DEBUG_context);
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case REG_DS: return DS_reg(&DEBUG_context);
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case REG_ES: return ES_reg(&DEBUG_context);
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case REG_SS: return SS_reg(&DEBUG_context);
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case REG_FS: return FS_reg(&DEBUG_context);
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case REG_GS: return GS_reg(&DEBUG_context);
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}
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return 0; /* should not happen */
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}
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/***********************************************************************
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* DEBUG_SetSigContext
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*
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* Set the register values from a sigcontext.
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*/
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extern void DEBUG_SetSigContext( const SIGCONTEXT *sigcontext )
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{
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EAX_reg(&DEBUG_context) = EAX_sig(sigcontext);
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EBX_reg(&DEBUG_context) = EBX_sig(sigcontext);
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ECX_reg(&DEBUG_context) = ECX_sig(sigcontext);
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EDX_reg(&DEBUG_context) = EDX_sig(sigcontext);
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ESI_reg(&DEBUG_context) = ESI_sig(sigcontext);
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EDI_reg(&DEBUG_context) = EDI_sig(sigcontext);
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EBP_reg(&DEBUG_context) = EBP_sig(sigcontext);
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EFL_reg(&DEBUG_context) = EFL_sig(sigcontext);
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EIP_reg(&DEBUG_context) = EIP_sig(sigcontext);
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ESP_reg(&DEBUG_context) = ESP_sig(sigcontext);
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CS_reg(&DEBUG_context) = LOWORD(CS_sig(sigcontext));
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DS_reg(&DEBUG_context) = LOWORD(DS_sig(sigcontext));
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ES_reg(&DEBUG_context) = LOWORD(ES_sig(sigcontext));
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SS_reg(&DEBUG_context) = LOWORD(SS_sig(sigcontext));
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#ifdef FS_sig
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FS_reg(&DEBUG_context) = LOWORD(FS_sig(sigcontext));
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#else
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__asm__("movw %%fs,%w0":"=r" (FS_reg(&DEBUG_context)));
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FS_reg(&DEBUG_context) &= 0xffff;
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#endif
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#ifdef GS_sig
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GS_reg(&DEBUG_context) = LOWORD(GS_sig(sigcontext));
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#else
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__asm__("movw %%gs,%w0":"=r" (GS_reg(&DEBUG_context)));
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GS_reg(&DEBUG_context) &= 0xffff;
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#endif
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}
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/***********************************************************************
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* DEBUG_GetSigContext
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*
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* Build a sigcontext from the register values.
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*/
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extern void DEBUG_GetSigContext( SIGCONTEXT *sigcontext )
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{
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EAX_sig(sigcontext) = EAX_reg(&DEBUG_context);
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EBX_sig(sigcontext) = EBX_reg(&DEBUG_context);
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ECX_sig(sigcontext) = ECX_reg(&DEBUG_context);
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EDX_sig(sigcontext) = EDX_reg(&DEBUG_context);
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ESI_sig(sigcontext) = ESI_reg(&DEBUG_context);
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EDI_sig(sigcontext) = EDI_reg(&DEBUG_context);
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EBP_sig(sigcontext) = EBP_reg(&DEBUG_context);
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EFL_sig(sigcontext) = EFL_reg(&DEBUG_context);
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EIP_sig(sigcontext) = EIP_reg(&DEBUG_context);
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ESP_sig(sigcontext) = ESP_reg(&DEBUG_context);
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CS_sig(sigcontext) = CS_reg(&DEBUG_context);
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DS_sig(sigcontext) = DS_reg(&DEBUG_context);
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ES_sig(sigcontext) = ES_reg(&DEBUG_context);
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SS_sig(sigcontext) = SS_reg(&DEBUG_context);
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#ifdef FS_sig
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FS_sig(sigcontext) = FS_reg(&DEBUG_context);
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#else
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__asm__("movw %w0,%%fs"::"r" (FS_reg(&DEBUG_context)));
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#endif
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#ifdef GS_sig
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GS_sig(sigcontext) = GS_reg(&DEBUG_context);
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#else
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__asm__("movw %w0,%%gs"::"r" (FS_reg(&DEBUG_context)));
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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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fprintf(stderr,"Register dump:\n");
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/* First get the segment registers out of the way */
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fprintf( stderr," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
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(WORD)CS_reg(&DEBUG_context), (WORD)SS_reg(&DEBUG_context),
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(WORD)DS_reg(&DEBUG_context), (WORD)ES_reg(&DEBUG_context),
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(WORD)FS_reg(&DEBUG_context), (WORD)GS_reg(&DEBUG_context) );
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if (dbg_mode == 16)
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{
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fprintf( stderr,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x\n",
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IP_reg(&DEBUG_context), SP_reg(&DEBUG_context),
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BP_reg(&DEBUG_context), FL_reg(&DEBUG_context) );
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fprintf( stderr," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
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AX_reg(&DEBUG_context), BX_reg(&DEBUG_context),
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CX_reg(&DEBUG_context), DX_reg(&DEBUG_context),
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SI_reg(&DEBUG_context), DI_reg(&DEBUG_context) );
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}
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else /* 32-bit mode */
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{
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fprintf( stderr, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx\n",
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EIP_reg(&DEBUG_context), ESP_reg(&DEBUG_context),
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EBP_reg(&DEBUG_context), EFL_reg(&DEBUG_context) );
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fprintf( stderr, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
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EAX_reg(&DEBUG_context), EBX_reg(&DEBUG_context),
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ECX_reg(&DEBUG_context), EDX_reg(&DEBUG_context) );
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fprintf( stderr, " ESI:%08lx EDI:%08lx\n",
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ESI_reg(&DEBUG_context), EDI_reg(&DEBUG_context) );
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}
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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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BOOL32 DEBUG_ValidateRegisters(void)
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{
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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) && \
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((((seg) & 7) != 7) || IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(seg)))) \
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{ \
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fprintf( stderr, "*** 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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if (CS_reg(&DEBUG_context) != WINE_CODE_SELECTOR)
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CHECK_SEG( CS_reg(&DEBUG_context), "CS" );
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if (SS_reg(&DEBUG_context) != WINE_DATA_SELECTOR)
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CHECK_SEG( SS_reg(&DEBUG_context), "SS" );
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if (DS_reg(&DEBUG_context) != WINE_DATA_SELECTOR)
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CHECK_SEG( DS_reg(&DEBUG_context), "DS" );
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if (ES_reg(&DEBUG_context) != WINE_DATA_SELECTOR)
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CHECK_SEG( ES_reg(&DEBUG_context), "ES" );
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if (FS_reg(&DEBUG_context) != WINE_DATA_SELECTOR)
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CHECK_SEG( FS_reg(&DEBUG_context), "FS" );
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if (GS_reg(&DEBUG_context) != WINE_DATA_SELECTOR)
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CHECK_SEG( GS_reg(&DEBUG_context), "GS" );
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/* Check that CS and SS are not NULL */
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if (!(CS_reg(&DEBUG_context) & ~3))
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{
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fprintf( stderr, "*** Invalid value for CS register: %04x\n",
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(WORD)CS_reg(&DEBUG_context) );
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return FALSE;
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}
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if (!(SS_reg(&DEBUG_context) & ~3))
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{
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fprintf( stderr, "*** Invalid value for SS register: %04x\n",
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(WORD)SS_reg(&DEBUG_context) );
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return FALSE;
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}
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return TRUE;
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#undef CHECK_SEG
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}
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