/* * Debugger register handling * * Copyright 1995 Alexandre Julliard */ #include "config.h" #include #include #include "debugger.h" /*********************************************************************** * DEBUG_SetRegister * * Set a register value. */ void DEBUG_SetRegister( enum debug_regs reg, int val ) { #ifdef __i386__ switch(reg) { case REG_EAX: DEBUG_context.Eax = val; break; case REG_EBX: DEBUG_context.Ebx = val; break; case REG_ECX: DEBUG_context.Ecx = val; break; case REG_EDX: DEBUG_context.Edx = val; break; case REG_ESI: DEBUG_context.Esi = val; break; case REG_EDI: DEBUG_context.Edi = val; break; case REG_EBP: DEBUG_context.Ebp = val; break; case REG_EFL: DEBUG_context.EFlags = val; break; case REG_EIP: DEBUG_context.Eip = val; break; case REG_ESP: DEBUG_context.Esp = val; break; case REG_CS: DEBUG_context.SegCs = val; break; case REG_DS: DEBUG_context.SegDs = val; break; case REG_ES: DEBUG_context.SegEs = val; break; case REG_SS: DEBUG_context.SegSs = val; break; case REG_FS: DEBUG_context.SegFs = val; break; case REG_GS: DEBUG_context.SegGs = val; break; #define SET_LOW_WORD(dw,lw) ((dw) = ((dw) & 0xFFFF0000) | LOWORD(lw)) case REG_AX: SET_LOW_WORD(DEBUG_context.Eax,val); break; case REG_BX: SET_LOW_WORD(DEBUG_context.Ebx,val); break; case REG_CX: SET_LOW_WORD(DEBUG_context.Ecx,val); break; case REG_DX: SET_LOW_WORD(DEBUG_context.Edx,val); break; case REG_SI: SET_LOW_WORD(DEBUG_context.Esi,val); break; case REG_DI: SET_LOW_WORD(DEBUG_context.Edi,val); break; case REG_BP: SET_LOW_WORD(DEBUG_context.Ebp,val); break; case REG_FL: SET_LOW_WORD(DEBUG_context.EFlags,val); break; case REG_IP: SET_LOW_WORD(DEBUG_context.Eip,val); break; case REG_SP: SET_LOW_WORD(DEBUG_context.Esp,val); break; #undef SET_LOWORD } #endif } int DEBUG_PrintRegister(enum debug_regs reg) { #ifdef __i386__ char* val = NULL; switch(reg) { case REG_EAX: val = "%%eax"; break; case REG_EBX: val = "%%ebx"; break; case REG_ECX: val = "%%ecx"; break; case REG_EDX: val = "%%edx"; break; case REG_ESI: val = "%%esi"; break; case REG_EDI: val = "%%edi"; break; case REG_EBP: val = "%%ebp"; break; case REG_EFL: val = "%%efl"; break; case REG_EIP: val = "%%eip"; break; case REG_ESP: val = "%%esp"; break; case REG_AX: val = "%%ax"; break; case REG_BX: val = "%%bx"; break; case REG_CX: val = "%%cx"; break; case REG_DX: val = "%%dx"; break; case REG_SI: val = "%%si"; break; case REG_DI: val = "%%di"; break; case REG_BP: val = "%%bp"; break; case REG_FL: val = "%%fl"; break; case REG_IP: val = "%%ip"; break; case REG_SP: val = "%%sp"; break; case REG_CS: val = "%%cs"; break; case REG_DS: val = "%%ds"; break; case REG_ES: val = "%%es"; break; case REG_SS: val = "%%ss"; break; case REG_FS: val = "%%fs"; break; case REG_GS: val = "%%gs"; break; } if (val) DEBUG_Printf(DBG_CHN_MESG, val); 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 DEBUG_context.Eax; case REG_EBX: return DEBUG_context.Ebx; case REG_ECX: return DEBUG_context.Ecx; case REG_EDX: return DEBUG_context.Edx; case REG_ESI: return DEBUG_context.Esi; case REG_EDI: return DEBUG_context.Edi; case REG_EBP: return DEBUG_context.Ebp; case REG_EFL: return DEBUG_context.EFlags; case REG_EIP: return DEBUG_context.Eip; case REG_ESP: return DEBUG_context.Esp; case REG_CS: return DEBUG_context.SegCs; case REG_DS: return DEBUG_context.SegDs; case REG_ES: return DEBUG_context.SegEs; case REG_SS: return DEBUG_context.SegSs; case REG_FS: return DEBUG_context.SegFs; case REG_GS: return DEBUG_context.SegGs; case REG_AX: return LOWORD(DEBUG_context.Eax); case REG_BX: return LOWORD(DEBUG_context.Ebx); case REG_CX: return LOWORD(DEBUG_context.Ecx); case REG_DX: return LOWORD(DEBUG_context.Edx); case REG_SI: return LOWORD(DEBUG_context.Esi); case REG_DI: return LOWORD(DEBUG_context.Edi); case REG_BP: return LOWORD(DEBUG_context.Ebp); case REG_FL: return LOWORD(DEBUG_context.EFlags); case REG_IP: return LOWORD(DEBUG_context.Eip); case REG_SP: return LOWORD(DEBUG_context.Esp); } #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) { DEBUG_Printf(DBG_CHN_MESG,"Register dump:\n"); #ifdef __i386__ /* First get the segment registers out of the way */ DEBUG_Printf( DBG_CHN_MESG," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x", (WORD)DEBUG_context.SegCs, (WORD)DEBUG_context.SegSs, (WORD)DEBUG_context.SegDs, (WORD)DEBUG_context.SegEs, (WORD)DEBUG_context.SegFs, (WORD)DEBUG_context.SegGs ); if (DEBUG_CurrThread->dbg_mode == 16) { char flag[33]; DEBUG_Printf( DBG_CHN_MESG,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n", LOWORD(DEBUG_context.Eip), LOWORD(DEBUG_context.Esp), LOWORD(DEBUG_context.Ebp), LOWORD(DEBUG_context.EFlags), DEBUG_Flags(LOWORD(DEBUG_context.EFlags), flag)); DEBUG_Printf( DBG_CHN_MESG," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n", LOWORD(DEBUG_context.Eax), LOWORD(DEBUG_context.Ebx), LOWORD(DEBUG_context.Ecx), LOWORD(DEBUG_context.Edx), LOWORD(DEBUG_context.Esi), LOWORD(DEBUG_context.Edi) ); } else /* 32-bit mode */ { char flag[33]; DEBUG_Printf( DBG_CHN_MESG, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n", DEBUG_context.Eip, DEBUG_context.Esp, DEBUG_context.Ebp, DEBUG_context.EFlags, DEBUG_Flags(DEBUG_context.EFlags, flag)); DEBUG_Printf( DBG_CHN_MESG, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n", DEBUG_context.Eax, DEBUG_context.Ebx, DEBUG_context.Ecx, DEBUG_context.Edx ); DEBUG_Printf( DBG_CHN_MESG, " ESI:%08lx EDI:%08lx\n", DEBUG_context.Esi, DEBUG_context.Edi ); } #endif } /*********************************************************************** * DEBUG_ValidateRegisters * * Make sure all registers have a correct value for returning from * the signal handler. */ BOOL DEBUG_ValidateRegisters(void) { #ifdef __i386__ if (DEBUG_context.EFlags & V86_FLAG) return TRUE; #if 0 /* 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) || !DEBUG_IsSelector(seg))) { \ DEBUG_Printf( DBG_CHN_MESG, "*** 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"); #endif /* Check that CS and SS are not NULL */ if (!(DEBUG_context.SegCs & ~3)) { DEBUG_Printf( DBG_CHN_MESG, "*** Invalid value for CS register: %04x\n", (WORD)DEBUG_context.SegCs ); return FALSE; } if (!(DEBUG_context.SegSs & ~3)) { DEBUG_Printf( DBG_CHN_MESG, "*** Invalid value for SS register: %04x\n", (WORD)DEBUG_context.SegSs ); return FALSE; } return TRUE; #undef CHECK_SEG #else return TRUE; #endif }