2 * Debugger register handling
4 * Copyright 1995 Alexandre Julliard
10 #include "selectors.h"
13 CONTEXT DEBUG_context;
15 /***********************************************************************
18 * Set a register value.
20 void DEBUG_SetRegister( enum debug_regs reg, int val )
24 case REG_EAX: EAX_reg(&DEBUG_context) = val; break;
25 case REG_EBX: EBX_reg(&DEBUG_context) = val; break;
26 case REG_ECX: ECX_reg(&DEBUG_context) = val; break;
27 case REG_EDX: EDX_reg(&DEBUG_context) = val; break;
28 case REG_ESI: ESI_reg(&DEBUG_context) = val; break;
29 case REG_EDI: EDI_reg(&DEBUG_context) = val; break;
30 case REG_EBP: EBP_reg(&DEBUG_context) = val; break;
31 case REG_EFL: EFL_reg(&DEBUG_context) = val; break;
32 case REG_EIP: EIP_reg(&DEBUG_context) = val; break;
33 case REG_ESP: ESP_reg(&DEBUG_context) = val; break;
34 case REG_AX: AX_reg(&DEBUG_context) = val; break;
35 case REG_BX: BX_reg(&DEBUG_context) = val; break;
36 case REG_CX: CX_reg(&DEBUG_context) = val; break;
37 case REG_DX: DX_reg(&DEBUG_context) = val; break;
38 case REG_SI: SI_reg(&DEBUG_context) = val; break;
39 case REG_DI: DI_reg(&DEBUG_context) = val; break;
40 case REG_BP: BP_reg(&DEBUG_context) = val; break;
41 case REG_FL: FL_reg(&DEBUG_context) = val; break;
42 case REG_IP: IP_reg(&DEBUG_context) = val; break;
43 case REG_SP: SP_reg(&DEBUG_context) = val; break;
44 case REG_CS: CS_reg(&DEBUG_context) = val; break;
45 case REG_DS: DS_reg(&DEBUG_context) = val; break;
46 case REG_ES: ES_reg(&DEBUG_context) = val; break;
47 case REG_SS: SS_reg(&DEBUG_context) = val; break;
48 case REG_FS: FS_reg(&DEBUG_context) = val; break;
49 case REG_GS: GS_reg(&DEBUG_context) = val; break;
55 DEBUG_PrintRegister(enum debug_regs reg)
59 case REG_EAX: fprintf(stderr, "%%eax"); break;
60 case REG_EBX: fprintf(stderr, "%%ebx"); break;
61 case REG_ECX: fprintf(stderr, "%%ecx"); break;
62 case REG_EDX: fprintf(stderr, "%%edx"); break;
63 case REG_ESI: fprintf(stderr, "%%esi"); break;
64 case REG_EDI: fprintf(stderr, "%%edi"); break;
65 case REG_EBP: fprintf(stderr, "%%ebp"); break;
66 case REG_EFL: fprintf(stderr, "%%efl"); break;
67 case REG_EIP: fprintf(stderr, "%%eip"); break;
68 case REG_ESP: fprintf(stderr, "%%esp"); break;
69 case REG_AX: fprintf(stderr, "%%ax"); break;
70 case REG_BX: fprintf(stderr, "%%bx"); break;
71 case REG_CX: fprintf(stderr, "%%cx"); break;
72 case REG_DX: fprintf(stderr, "%%dx"); break;
73 case REG_SI: fprintf(stderr, "%%si"); break;
74 case REG_DI: fprintf(stderr, "%%di"); break;
75 case REG_BP: fprintf(stderr, "%%bp"); break;
76 case REG_FL: fprintf(stderr, "%%fl"); break;
77 case REG_IP: fprintf(stderr, "%%ip"); break;
78 case REG_SP: fprintf(stderr, "%%sp"); break;
79 case REG_CS: fprintf(stderr, "%%cs"); break;
80 case REG_DS: fprintf(stderr, "%%ds"); break;
81 case REG_ES: fprintf(stderr, "%%es"); break;
82 case REG_SS: fprintf(stderr, "%%ss"); break;
83 case REG_FS: fprintf(stderr, "%%fs"); break;
84 case REG_GS: fprintf(stderr, "%%gs"); break;
89 /***********************************************************************
92 * Get a register value.
94 int DEBUG_GetRegister( enum debug_regs reg )
98 case REG_EAX: return EAX_reg(&DEBUG_context);
99 case REG_EBX: return EBX_reg(&DEBUG_context);
100 case REG_ECX: return ECX_reg(&DEBUG_context);
101 case REG_EDX: return EDX_reg(&DEBUG_context);
102 case REG_ESI: return ESI_reg(&DEBUG_context);
103 case REG_EDI: return EDI_reg(&DEBUG_context);
104 case REG_EBP: return EBP_reg(&DEBUG_context);
105 case REG_EFL: return EFL_reg(&DEBUG_context);
106 case REG_EIP: return EIP_reg(&DEBUG_context);
107 case REG_ESP: return ESP_reg(&DEBUG_context);
108 case REG_AX: return AX_reg(&DEBUG_context);
109 case REG_BX: return BX_reg(&DEBUG_context);
110 case REG_CX: return CX_reg(&DEBUG_context);
111 case REG_DX: return DX_reg(&DEBUG_context);
112 case REG_SI: return SI_reg(&DEBUG_context);
113 case REG_DI: return DI_reg(&DEBUG_context);
114 case REG_BP: return BP_reg(&DEBUG_context);
115 case REG_FL: return FL_reg(&DEBUG_context);
116 case REG_IP: return IP_reg(&DEBUG_context);
117 case REG_SP: return SP_reg(&DEBUG_context);
118 case REG_CS: return CS_reg(&DEBUG_context);
119 case REG_DS: return DS_reg(&DEBUG_context);
120 case REG_ES: return ES_reg(&DEBUG_context);
121 case REG_SS: return SS_reg(&DEBUG_context);
122 case REG_FS: return FS_reg(&DEBUG_context);
123 case REG_GS: return GS_reg(&DEBUG_context);
125 return 0; /* should not happen */
129 /***********************************************************************
132 * Return Flag String.
134 char *DEBUG_Flags( DWORD flag, char *buf )
138 strcpy( buf, " - 00 - - - " );
139 pt = buf + strlen( buf );
140 if ( buf >= pt-- ) return( buf );
141 if ( flag & 0x00000001 ) *pt = 'C'; /* Carry Falg */
142 if ( buf >= pt-- ) return( buf );
143 if ( flag & 0x00000002 ) *pt = '1';
144 if ( buf >= pt-- ) return( buf );
145 if ( flag & 0x00000004 ) *pt = 'P'; /* Parity Flag */
146 if ( buf >= pt-- ) return( buf );
147 if ( flag & 0x00000008 ) *pt = '-';
148 if ( buf >= pt-- ) return( buf );
149 if ( flag & 0x00000010 ) *pt = 'A'; /* Auxiliary Carry Flag */
150 if ( buf >= pt-- ) return( buf );
151 if ( flag & 0x00000020 ) *pt = '-';
152 if ( buf >= pt-- ) return( buf );
153 if ( flag & 0x00000040 ) *pt = 'Z'; /* Zero Flag */
154 if ( buf >= pt-- ) return( buf );
155 if ( flag & 0x00000080 ) *pt = 'S'; /* Sign Flag */
156 if ( buf >= pt-- ) return( buf );
157 if ( flag & 0x00000100 ) *pt = 'T'; /* Trap/Trace Flag */
158 if ( buf >= pt-- ) return( buf );
159 if ( flag & 0x00000200 ) *pt = 'I'; /* Interupt Enable Flag */
160 if ( buf >= pt-- ) return( buf );
161 if ( flag & 0x00000400 ) *pt = 'D'; /* Direction Indicator */
162 if ( buf >= pt-- ) return( buf );
163 if ( flag & 0x00000800 ) *pt = 'O'; /* Overflow Flag */
164 if ( buf >= pt-- ) return( buf );
165 if ( flag & 0x00001000 ) *pt = '1'; /* I/O Privilage Level */
166 if ( buf >= pt-- ) return( buf );
167 if ( flag & 0x00002000 ) *pt = '1'; /* I/O Privilage Level */
168 if ( buf >= pt-- ) return( buf );
169 if ( flag & 0x00004000 ) *pt = 'N'; /* Nested Task Flag */
170 if ( buf >= pt-- ) return( buf );
171 if ( flag & 0x00008000 ) *pt = '-';
172 if ( buf >= pt-- ) return( buf );
173 if ( flag & 0x00010000 ) *pt = 'R'; /* Resume Flag */
174 if ( buf >= pt-- ) return( buf );
175 if ( flag & 0x00020000 ) *pt = 'V'; /* Vritual Mode Flag */
176 if ( buf >= pt-- ) return( buf );
177 if ( flag & 0x00040000 ) *pt = 'a'; /* Alignment Check Flag */
178 if ( buf >= pt-- ) return( buf );
183 /***********************************************************************
184 * DEBUG_InfoRegisters
186 * Display registers information.
188 void DEBUG_InfoRegisters(void)
192 fprintf(stderr,"Register dump:\n");
194 /* First get the segment registers out of the way */
195 fprintf( stderr," CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
196 (WORD)CS_reg(&DEBUG_context), (WORD)SS_reg(&DEBUG_context),
197 (WORD)DS_reg(&DEBUG_context), (WORD)ES_reg(&DEBUG_context),
198 (WORD)FS_reg(&DEBUG_context), (WORD)GS_reg(&DEBUG_context) );
201 fprintf( stderr,"\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
202 IP_reg(&DEBUG_context), SP_reg(&DEBUG_context),
203 BP_reg(&DEBUG_context), FL_reg(&DEBUG_context),
204 DEBUG_Flags(FL_reg(&DEBUG_context), flag));
205 fprintf( stderr," AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
206 AX_reg(&DEBUG_context), BX_reg(&DEBUG_context),
207 CX_reg(&DEBUG_context), DX_reg(&DEBUG_context),
208 SI_reg(&DEBUG_context), DI_reg(&DEBUG_context) );
210 else /* 32-bit mode */
212 fprintf( stderr, "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
213 EIP_reg(&DEBUG_context), ESP_reg(&DEBUG_context),
214 EBP_reg(&DEBUG_context), EFL_reg(&DEBUG_context),
215 DEBUG_Flags(EFL_reg(&DEBUG_context), flag));
216 fprintf( stderr, " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
217 EAX_reg(&DEBUG_context), EBX_reg(&DEBUG_context),
218 ECX_reg(&DEBUG_context), EDX_reg(&DEBUG_context) );
219 fprintf( stderr, " ESI:%08lx EDI:%08lx\n",
220 ESI_reg(&DEBUG_context), EDI_reg(&DEBUG_context) );
225 /***********************************************************************
226 * DEBUG_ValidateRegisters
228 * Make sure all registers have a correct value for returning from
229 * the signal handler.
231 BOOL DEBUG_ValidateRegisters(void)
235 if (ISV86(&DEBUG_context)) return TRUE;
237 /* Check that a selector is a valid ring-3 LDT selector, or a NULL selector */
238 #define CHECK_SEG(seg,name) \
239 if (((seg) & ~3) && \
240 ((((seg) & 7) != 7) || IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(seg)))) \
242 fprintf( stderr, "*** Invalid value for %s register: %04x\n", \
243 (name), (WORD)(seg) ); \
249 if (CS_reg(&DEBUG_context) != cs) CHECK_SEG(CS_reg(&DEBUG_context), "CS");
250 if (SS_reg(&DEBUG_context) != ds) CHECK_SEG(SS_reg(&DEBUG_context), "SS");
251 if (DS_reg(&DEBUG_context) != ds) CHECK_SEG(DS_reg(&DEBUG_context), "DS");
252 if (ES_reg(&DEBUG_context) != ds) CHECK_SEG(ES_reg(&DEBUG_context), "ES");
253 if (FS_reg(&DEBUG_context) != ds) CHECK_SEG(FS_reg(&DEBUG_context), "FS");
254 if (GS_reg(&DEBUG_context) != ds) CHECK_SEG(GS_reg(&DEBUG_context), "GS");
256 /* Check that CS and SS are not NULL */
258 if (!ISV86(&DEBUG_context))
259 if (!(CS_reg(&DEBUG_context) & ~3))
261 fprintf( stderr, "*** Invalid value for CS register: %04x\n",
262 (WORD)CS_reg(&DEBUG_context) );
265 if (!(SS_reg(&DEBUG_context) & ~3))
267 fprintf( stderr, "*** Invalid value for SS register: %04x\n",
268 (WORD)SS_reg(&DEBUG_context) );