/* * Debugger register handling * * Copyright 1995 Alexandre Julliard */ #include #include "debugger.h" CONTEXT DEBUG_context; /*********************************************************************** * DEBUG_SetRegister * * Set a register value. */ void DEBUG_SetRegister( enum debug_regs reg, int val ) { 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_AX: AX_reg(&DEBUG_context) = val; break; case REG_BX: BX_reg(&DEBUG_context) = val; break; case REG_CX: CX_reg(&DEBUG_context) = val; break; case REG_DX: DX_reg(&DEBUG_context) = val; break; case REG_SI: SI_reg(&DEBUG_context) = val; break; case REG_DI: DI_reg(&DEBUG_context) = val; break; case REG_BP: BP_reg(&DEBUG_context) = val; break; case REG_FL: FL_reg(&DEBUG_context) = val; break; case REG_IP: IP_reg(&DEBUG_context) = val; break; case REG_SP: SP_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; } } int DEBUG_PrintRegister(enum debug_regs reg) { 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; } /*********************************************************************** * DEBUG_GetRegister * * Get a register value. */ int DEBUG_GetRegister( enum debug_regs reg ) { 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_AX: return AX_reg(&DEBUG_context); case REG_BX: return BX_reg(&DEBUG_context); case REG_CX: return CX_reg(&DEBUG_context); case REG_DX: return DX_reg(&DEBUG_context); case REG_SI: return SI_reg(&DEBUG_context); case REG_DI: return DI_reg(&DEBUG_context); case REG_BP: return BP_reg(&DEBUG_context); case REG_FL: return FL_reg(&DEBUG_context); case REG_IP: return IP_reg(&DEBUG_context); case REG_SP: return SP_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); } return 0; /* should not happen */ } /*********************************************************************** * DEBUG_SetSigContext * * Set the register values from a sigcontext. */ void DEBUG_SetSigContext( const SIGCONTEXT *sigcontext ) { EAX_reg(&DEBUG_context) = EAX_sig(sigcontext); EBX_reg(&DEBUG_context) = EBX_sig(sigcontext); ECX_reg(&DEBUG_context) = ECX_sig(sigcontext); EDX_reg(&DEBUG_context) = EDX_sig(sigcontext); ESI_reg(&DEBUG_context) = ESI_sig(sigcontext); EDI_reg(&DEBUG_context) = EDI_sig(sigcontext); EBP_reg(&DEBUG_context) = EBP_sig(sigcontext); EFL_reg(&DEBUG_context) = EFL_sig(sigcontext); EIP_reg(&DEBUG_context) = EIP_sig(sigcontext); ESP_reg(&DEBUG_context) = ESP_sig(sigcontext); CS_reg(&DEBUG_context) = LOWORD(CS_sig(sigcontext)); DS_reg(&DEBUG_context) = LOWORD(DS_sig(sigcontext)); ES_reg(&DEBUG_context) = LOWORD(ES_sig(sigcontext)); SS_reg(&DEBUG_context) = LOWORD(SS_sig(sigcontext)); #ifdef FS_sig FS_reg(&DEBUG_context) = LOWORD(FS_sig(sigcontext)); #else GET_FS( FS_reg(&DEBUG_context) ); FS_reg(&DEBUG_context) &= 0xffff; #endif #ifdef GS_sig GS_reg(&DEBUG_context) = LOWORD(GS_sig(sigcontext)); #else GET_GS( GS_reg(&DEBUG_context) ); GS_reg(&DEBUG_context) &= 0xffff; #endif } /*********************************************************************** * DEBUG_GetSigContext * * Build a sigcontext from the register values. */ void DEBUG_GetSigContext( SIGCONTEXT *sigcontext ) { EAX_sig(sigcontext) = EAX_reg(&DEBUG_context); EBX_sig(sigcontext) = EBX_reg(&DEBUG_context); ECX_sig(sigcontext) = ECX_reg(&DEBUG_context); EDX_sig(sigcontext) = EDX_reg(&DEBUG_context); ESI_sig(sigcontext) = ESI_reg(&DEBUG_context); EDI_sig(sigcontext) = EDI_reg(&DEBUG_context); EBP_sig(sigcontext) = EBP_reg(&DEBUG_context); EFL_sig(sigcontext) = EFL_reg(&DEBUG_context); EIP_sig(sigcontext) = EIP_reg(&DEBUG_context); ESP_sig(sigcontext) = ESP_reg(&DEBUG_context); CS_sig(sigcontext) = CS_reg(&DEBUG_context); DS_sig(sigcontext) = DS_reg(&DEBUG_context); ES_sig(sigcontext) = ES_reg(&DEBUG_context); SS_sig(sigcontext) = SS_reg(&DEBUG_context); #ifdef FS_sig FS_sig(sigcontext) = FS_reg(&DEBUG_context); #else SET_FS( FS_reg(&DEBUG_context) ); #endif #ifdef GS_sig GS_sig(sigcontext) = GS_reg(&DEBUG_context); #else SET_GS( GS_reg(&DEBUG_context) ); #endif } /*********************************************************************** * DEBUG_InfoRegisters * * Display registers information. */ void DEBUG_InfoRegisters(void) { fprintf(stderr,"Register dump:\n"); /* 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) { fprintf( stderr,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x\n", IP_reg(&DEBUG_context), SP_reg(&DEBUG_context), BP_reg(&DEBUG_context), FL_reg(&DEBUG_context) ); 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 */ { fprintf( stderr, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx\n", EIP_reg(&DEBUG_context), ESP_reg(&DEBUG_context), EBP_reg(&DEBUG_context), EFL_reg(&DEBUG_context) ); 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) ); } } /*********************************************************************** * DEBUG_ValidateRegisters * * Make sure all registers have a correct value for returning from * the signal handler. */ BOOL32 DEBUG_ValidateRegisters(void) { WORD cs, ds; /* 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; \ } GET_CS(cs); GET_DS(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 (!(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 }