2 * Debugger register handling
4 * Copyright 1995 Alexandre Julliard
10 CONTEXT DEBUG_context;
12 /***********************************************************************
15 * Set a register value.
17 void DEBUG_SetRegister( enum debug_regs reg, int val )
21 case REG_EAX: EAX_reg(&DEBUG_context) = val; break;
22 case REG_EBX: EBX_reg(&DEBUG_context) = val; break;
23 case REG_ECX: ECX_reg(&DEBUG_context) = val; break;
24 case REG_EDX: EDX_reg(&DEBUG_context) = val; break;
25 case REG_ESI: ESI_reg(&DEBUG_context) = val; break;
26 case REG_EDI: EDI_reg(&DEBUG_context) = val; break;
27 case REG_EBP: EBP_reg(&DEBUG_context) = val; break;
28 case REG_EFL: EFL_reg(&DEBUG_context) = val; break;
29 case REG_EIP: EIP_reg(&DEBUG_context) = val; break;
30 case REG_ESP: ESP_reg(&DEBUG_context) = val; break;
31 case REG_AX: AX_reg(&DEBUG_context) = val; break;
32 case REG_BX: BX_reg(&DEBUG_context) = val; break;
33 case REG_CX: CX_reg(&DEBUG_context) = val; break;
34 case REG_DX: DX_reg(&DEBUG_context) = val; break;
35 case REG_SI: SI_reg(&DEBUG_context) = val; break;
36 case REG_DI: DI_reg(&DEBUG_context) = val; break;
37 case REG_BP: BP_reg(&DEBUG_context) = val; break;
38 case REG_FL: FL_reg(&DEBUG_context) = val; break;
39 case REG_IP: IP_reg(&DEBUG_context) = val; break;
40 case REG_SP: SP_reg(&DEBUG_context) = val; break;
41 case REG_CS: CS_reg(&DEBUG_context) = val; break;
42 case REG_DS: DS_reg(&DEBUG_context) = val; break;
43 case REG_ES: ES_reg(&DEBUG_context) = val; break;
44 case REG_SS: SS_reg(&DEBUG_context) = val; break;
45 case REG_FS: FS_reg(&DEBUG_context) = val; break;
46 case REG_GS: GS_reg(&DEBUG_context) = val; break;
52 DEBUG_PrintRegister(enum debug_regs reg)
56 case REG_EAX: fprintf(stderr, "%%eax"); break;
57 case REG_EBX: fprintf(stderr, "%%ebx"); break;
58 case REG_ECX: fprintf(stderr, "%%ecx"); break;
59 case REG_EDX: fprintf(stderr, "%%edx"); break;
60 case REG_ESI: fprintf(stderr, "%%esi"); break;
61 case REG_EDI: fprintf(stderr, "%%edi"); break;
62 case REG_EBP: fprintf(stderr, "%%ebp"); break;
63 case REG_EFL: fprintf(stderr, "%%efl"); break;
64 case REG_EIP: fprintf(stderr, "%%eip"); break;
65 case REG_ESP: fprintf(stderr, "%%esp"); break;
66 case REG_AX: fprintf(stderr, "%%ax"); break;
67 case REG_BX: fprintf(stderr, "%%bx"); break;
68 case REG_CX: fprintf(stderr, "%%cx"); break;
69 case REG_DX: fprintf(stderr, "%%dx"); break;
70 case REG_SI: fprintf(stderr, "%%si"); break;
71 case REG_DI: fprintf(stderr, "%%di"); break;
72 case REG_BP: fprintf(stderr, "%%bp"); break;
73 case REG_FL: fprintf(stderr, "%%fl"); break;
74 case REG_IP: fprintf(stderr, "%%ip"); break;
75 case REG_SP: fprintf(stderr, "%%sp"); break;
76 case REG_CS: fprintf(stderr, "%%cs"); break;
77 case REG_DS: fprintf(stderr, "%%ds"); break;
78 case REG_ES: fprintf(stderr, "%%es"); break;
79 case REG_SS: fprintf(stderr, "%%ss"); break;
80 case REG_FS: fprintf(stderr, "%%fs"); break;
81 case REG_GS: fprintf(stderr, "%%gs"); break;
86 /***********************************************************************
89 * Get a register value.
91 int DEBUG_GetRegister( enum debug_regs reg )
95 case REG_EAX: return EAX_reg(&DEBUG_context);
96 case REG_EBX: return EBX_reg(&DEBUG_context);
97 case REG_ECX: return ECX_reg(&DEBUG_context);
98 case REG_EDX: return EDX_reg(&DEBUG_context);
99 case REG_ESI: return ESI_reg(&DEBUG_context);
100 case REG_EDI: return EDI_reg(&DEBUG_context);
101 case REG_EBP: return EBP_reg(&DEBUG_context);
102 case REG_EFL: return EFL_reg(&DEBUG_context);
103 case REG_EIP: return EIP_reg(&DEBUG_context);
104 case REG_ESP: return ESP_reg(&DEBUG_context);
105 case REG_AX: return AX_reg(&DEBUG_context);
106 case REG_BX: return BX_reg(&DEBUG_context);
107 case REG_CX: return CX_reg(&DEBUG_context);
108 case REG_DX: return DX_reg(&DEBUG_context);
109 case REG_SI: return SI_reg(&DEBUG_context);
110 case REG_DI: return DI_reg(&DEBUG_context);
111 case REG_BP: return BP_reg(&DEBUG_context);
112 case REG_FL: return FL_reg(&DEBUG_context);
113 case REG_IP: return IP_reg(&DEBUG_context);
114 case REG_SP: return SP_reg(&DEBUG_context);
115 case REG_CS: return CS_reg(&DEBUG_context);
116 case REG_DS: return DS_reg(&DEBUG_context);
117 case REG_ES: return ES_reg(&DEBUG_context);
118 case REG_SS: return SS_reg(&DEBUG_context);
119 case REG_FS: return FS_reg(&DEBUG_context);
120 case REG_GS: return GS_reg(&DEBUG_context);
122 return 0; /* should not happen */
126 /***********************************************************************
127 * DEBUG_SetSigContext
129 * Set the register values from a sigcontext.
131 void DEBUG_SetSigContext( const SIGCONTEXT *sigcontext )
133 EAX_reg(&DEBUG_context) = EAX_sig(sigcontext);
134 EBX_reg(&DEBUG_context) = EBX_sig(sigcontext);
135 ECX_reg(&DEBUG_context) = ECX_sig(sigcontext);
136 EDX_reg(&DEBUG_context) = EDX_sig(sigcontext);
137 ESI_reg(&DEBUG_context) = ESI_sig(sigcontext);
138 EDI_reg(&DEBUG_context) = EDI_sig(sigcontext);
139 EBP_reg(&DEBUG_context) = EBP_sig(sigcontext);
140 EFL_reg(&DEBUG_context) = EFL_sig(sigcontext);
141 EIP_reg(&DEBUG_context) = EIP_sig(sigcontext);
142 ESP_reg(&DEBUG_context) = ESP_sig(sigcontext);
143 CS_reg(&DEBUG_context) = LOWORD(CS_sig(sigcontext));
144 DS_reg(&DEBUG_context) = LOWORD(DS_sig(sigcontext));
145 ES_reg(&DEBUG_context) = LOWORD(ES_sig(sigcontext));
146 SS_reg(&DEBUG_context) = LOWORD(SS_sig(sigcontext));
148 FS_reg(&DEBUG_context) = LOWORD(FS_sig(sigcontext));
150 GET_FS( FS_reg(&DEBUG_context) );
151 FS_reg(&DEBUG_context) &= 0xffff;
154 GS_reg(&DEBUG_context) = LOWORD(GS_sig(sigcontext));
156 GET_GS( GS_reg(&DEBUG_context) );
157 GS_reg(&DEBUG_context) &= 0xffff;
159 if (ISV86(&DEBUG_context))
160 (char*)V86BASE(&DEBUG_context) = DOSMEM_MemoryBase(0);
164 /***********************************************************************
165 * DEBUG_GetSigContext
167 * Build a sigcontext from the register values.
169 void DEBUG_GetSigContext( SIGCONTEXT *sigcontext )
171 EAX_sig(sigcontext) = EAX_reg(&DEBUG_context);
172 EBX_sig(sigcontext) = EBX_reg(&DEBUG_context);
173 ECX_sig(sigcontext) = ECX_reg(&DEBUG_context);
174 EDX_sig(sigcontext) = EDX_reg(&DEBUG_context);
175 ESI_sig(sigcontext) = ESI_reg(&DEBUG_context);
176 EDI_sig(sigcontext) = EDI_reg(&DEBUG_context);
177 EBP_sig(sigcontext) = EBP_reg(&DEBUG_context);
178 EFL_sig(sigcontext) = EFL_reg(&DEBUG_context);
179 EIP_sig(sigcontext) = EIP_reg(&DEBUG_context);
180 ESP_sig(sigcontext) = ESP_reg(&DEBUG_context);
181 CS_sig(sigcontext) = CS_reg(&DEBUG_context);
182 DS_sig(sigcontext) = DS_reg(&DEBUG_context);
183 ES_sig(sigcontext) = ES_reg(&DEBUG_context);
184 SS_sig(sigcontext) = SS_reg(&DEBUG_context);
186 FS_sig(sigcontext) = FS_reg(&DEBUG_context);
188 SET_FS( FS_reg(&DEBUG_context) );
191 GS_sig(sigcontext) = GS_reg(&DEBUG_context);
193 SET_GS( GS_reg(&DEBUG_context) );
197 /***********************************************************************
200 * Return Flag String.
202 char *DEBUG_Flags( DWORD flag, char *buf )
206 strcpy( buf, " - 00 - - - " );
207 pt = buf + strlen( buf );
208 if ( buf >= pt-- ) return( buf );
209 if ( flag & 0x00000001 ) *pt = 'C'; /* Carry Falg */
210 if ( buf >= pt-- ) return( buf );
211 if ( flag & 0x00000002 ) *pt = '1';
212 if ( buf >= pt-- ) return( buf );
213 if ( flag & 0x00000004 ) *pt = 'P'; /* Parity Flag */
214 if ( buf >= pt-- ) return( buf );
215 if ( flag & 0x00000008 ) *pt = '-';
216 if ( buf >= pt-- ) return( buf );
217 if ( flag & 0x00000010 ) *pt = 'A'; /* Auxiliary Carry Flag */
218 if ( buf >= pt-- ) return( buf );
219 if ( flag & 0x00000020 ) *pt = '-';
220 if ( buf >= pt-- ) return( buf );
221 if ( flag & 0x00000040 ) *pt = 'Z'; /* Zero Flag */
222 if ( buf >= pt-- ) return( buf );
223 if ( flag & 0x00000080 ) *pt = 'S'; /* Sign Flag */
224 if ( buf >= pt-- ) return( buf );
225 if ( flag & 0x00000100 ) *pt = 'T'; /* Trap/Trace Flag */
226 if ( buf >= pt-- ) return( buf );
227 if ( flag & 0x00000200 ) *pt = 'I'; /* Interupt Enable Flag */
228 if ( buf >= pt-- ) return( buf );
229 if ( flag & 0x00000400 ) *pt = 'D'; /* Direction Indicator */
230 if ( buf >= pt-- ) return( buf );
231 if ( flag & 0x00000800 ) *pt = 'O'; /* Overflow Flag */
232 if ( buf >= pt-- ) return( buf );
233 if ( flag & 0x00001000 ) *pt = '1'; /* I/O Privilage Level */
234 if ( buf >= pt-- ) return( buf );
235 if ( flag & 0x00002000 ) *pt = '1'; /* I/O Privilage Level */
236 if ( buf >= pt-- ) return( buf );
237 if ( flag & 0x00004000 ) *pt = 'N'; /* Nested Task Flag */
238 if ( buf >= pt-- ) return( buf );
239 if ( flag & 0x00008000 ) *pt = '-';
240 if ( buf >= pt-- ) return( buf );
241 if ( flag & 0x00010000 ) *pt = 'R'; /* Resume Flag */
242 if ( buf >= pt-- ) return( buf );
243 if ( flag & 0x00020000 ) *pt = 'V'; /* Vritual Mode Flag */
244 if ( buf >= pt-- ) return( buf );
245 if ( flag & 0x00040000 ) *pt = 'a'; /* Alignment Check Flag */
246 if ( buf >= pt-- ) return( buf );
251 /***********************************************************************
252 * DEBUG_InfoRegisters
254 * Display registers information.
256 void DEBUG_InfoRegisters(void)
260 fprintf(stderr,"Register dump:\n");
262 /* First get the segment registers out of the way */
263 fprintf( stderr," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
264 (WORD)CS_reg(&DEBUG_context), (WORD)SS_reg(&DEBUG_context),
265 (WORD)DS_reg(&DEBUG_context), (WORD)ES_reg(&DEBUG_context),
266 (WORD)FS_reg(&DEBUG_context), (WORD)GS_reg(&DEBUG_context) );
269 fprintf( stderr,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
270 IP_reg(&DEBUG_context), SP_reg(&DEBUG_context),
271 BP_reg(&DEBUG_context), FL_reg(&DEBUG_context),
272 DEBUG_Flags(FL_reg(&DEBUG_context), flag));
273 fprintf( stderr," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
274 AX_reg(&DEBUG_context), BX_reg(&DEBUG_context),
275 CX_reg(&DEBUG_context), DX_reg(&DEBUG_context),
276 SI_reg(&DEBUG_context), DI_reg(&DEBUG_context) );
278 else /* 32-bit mode */
280 fprintf( stderr, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
281 EIP_reg(&DEBUG_context), ESP_reg(&DEBUG_context),
282 EBP_reg(&DEBUG_context), EFL_reg(&DEBUG_context),
283 DEBUG_Flags(EFL_reg(&DEBUG_context), flag));
284 fprintf( stderr, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
285 EAX_reg(&DEBUG_context), EBX_reg(&DEBUG_context),
286 ECX_reg(&DEBUG_context), EDX_reg(&DEBUG_context) );
287 fprintf( stderr, " ESI:%08lx EDI:%08lx\n",
288 ESI_reg(&DEBUG_context), EDI_reg(&DEBUG_context) );
293 /***********************************************************************
294 * DEBUG_ValidateRegisters
296 * Make sure all registers have a correct value for returning from
297 * the signal handler.
299 BOOL32 DEBUG_ValidateRegisters(void)
303 if (ISV86(&DEBUG_context)) return TRUE;
305 /* Check that a selector is a valid ring-3 LDT selector, or a NULL selector */
306 #define CHECK_SEG(seg,name) \
307 if (((seg) & ~3) && \
308 ((((seg) & 7) != 7) || IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(seg)))) \
310 fprintf( stderr, "*** Invalid value for %s register: %04x\n", \
311 (name), (WORD)(seg) ); \
317 if (CS_reg(&DEBUG_context) != cs) CHECK_SEG(CS_reg(&DEBUG_context), "CS");
318 if (SS_reg(&DEBUG_context) != ds) CHECK_SEG(SS_reg(&DEBUG_context), "SS");
319 if (DS_reg(&DEBUG_context) != ds) CHECK_SEG(DS_reg(&DEBUG_context), "DS");
320 if (ES_reg(&DEBUG_context) != ds) CHECK_SEG(ES_reg(&DEBUG_context), "ES");
321 if (FS_reg(&DEBUG_context) != ds) CHECK_SEG(FS_reg(&DEBUG_context), "FS");
322 if (GS_reg(&DEBUG_context) != ds) CHECK_SEG(GS_reg(&DEBUG_context), "GS");
324 /* Check that CS and SS are not NULL */
326 if (!ISV86(&DEBUG_context))
327 if (!(CS_reg(&DEBUG_context) & ~3))
329 fprintf( stderr, "*** Invalid value for CS register: %04x\n",
330 (WORD)CS_reg(&DEBUG_context) );
333 if (!(SS_reg(&DEBUG_context) & ~3))
335 fprintf( stderr, "*** Invalid value for SS register: %04x\n",
336 (WORD)SS_reg(&DEBUG_context) );