debugger/dbg.y

   1 %{
   2 /*
   3  * Parser for command lines in the Wine debugger
   4  *
   5  * Copyright 1993 Eric Youngdale
   6  * Copyright 1995 Morten Welinder
   7  * Copyright 2000 Eric Pouech
   8  */
   9
  10 #include "config.h"
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <signal.h>
  16 #include <unistd.h>
  17
  18 #include "wine/exception.h"
  19 #include "debugger.h"
  20 #include "expr.h"
  21 #include "task.h"
  22
  23 extern FILE * yyin;
  24 int curr_frame = 0;
  25
  26 static void issue_prompt(void);
  27 static void mode_command(int);
  28 int yylex(void);
  29 int yyerror(char *);
  30
  31 %}
  32
  33 %union
  34 {
  35     DBG_VALUE        value;
  36     char *           string;
  37     int              integer;
  38     struct list_id   listing;
  39     struct expr *    expression;
  40     struct datatype * type;
  41 }
  42
  43 %token tCONT tPASS tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  44 %token tENABLE tDISABLE tBREAK tWATCH tDELETE tSET tMODE tPRINT tEXAM tABORT
  45 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  46 %token tPROCESS tTHREAD tMODREF
  47 %token tEOL tSTRING tDEBUGSTR
  48 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  49 %token tSTEPI tNEXTI tFINISH tSHOW tDIR tWHATIS
  50 %token <string> tPATH
  51 %token <string> tIDENTIFIER tSTRING tDEBUGSTR tINTVAR
  52 %token <integer> tNUM tFORMAT
  53 %token tSYMBOLFILE
  54
  55 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  56 %token tSTRUCT tUNION tENUM
  57
  58 /* %left ',' */
  59 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  60          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  61          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  62 /* %left OP_COND */ /* ... ? ... : ... */
  63 %left OP_LOR
  64 %left OP_LAND
  65 %left '|'
  66 %left '^'
  67 %left '&'
  68 %left OP_EQ OP_NE
  69 %left '<' '>' OP_LE OP_GE
  70 %left OP_SHL OP_SHR
  71 %left '+' '-'
  72 %left '*' '/' '%'
  73 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
  74 %left '.' '[' OP_DRF
  75 %nonassoc ':'
  76
  77 %type <expression> expr lval lvalue
  78 %type <type> type_cast type_expr
  79 %type <value> expr_addr lval_addr
  80 %type <integer> expr_value
  81 %type <string> pathname
  82
  83 %type <listing> list_arg
  84
  85 %%
  86
  87 input: line                    { issue_prompt(); }
  88     | input line               { issue_prompt(); }
  89
  90 line: command
  91     | tEOL
  92     | error tEOL               { yyerrok; }
  93
  94 command:
  95       tQUIT tEOL               { DEBUG_CurrThread->dbg_exec_count = 1;
  96                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_KILL; return 1; }
  97     | tHELP tEOL               { DEBUG_Help(); }
  98     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
  99     | tCONT tEOL               { DEBUG_CurrThread->dbg_exec_count = 1;
 100                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_CONT; return 0; }
 101     | tPASS tEOL               { DEBUG_CurrThread->dbg_exec_count = 1;
 102                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_PASS; return 0; }
 103     | tCONT tNUM tEOL          { DEBUG_CurrThread->dbg_exec_count = $2;
 104                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_CONT; return 0; }
 105     | tSTEP tEOL               { DEBUG_CurrThread->dbg_exec_count = 1;
 106                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 107     | tNEXT tEOL               { DEBUG_CurrThread->dbg_exec_count = 1;
 108                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 109     | tSTEP tNUM tEOL          { DEBUG_CurrThread->dbg_exec_count = $2;
 110                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 111     | tNEXT tNUM tEOL          { DEBUG_CurrThread->dbg_exec_count = $2;
 112                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 113     | tSTEPI tEOL              { DEBUG_CurrThread->dbg_exec_count = 1;
 114                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 115     | tNEXTI tEOL              { DEBUG_CurrThread->dbg_exec_count = 1;
 116                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 117     | tSTEPI tNUM tEOL         { DEBUG_CurrThread->dbg_exec_count = $2;
 118                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 119     | tNEXTI tNUM tEOL         { DEBUG_CurrThread->dbg_exec_count = $2;
 120                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 121     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 122     | tMODE tNUM tEOL          { mode_command($2); }
 123     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 124     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 125     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 126     | tBACKTRACE tEOL          { DEBUG_BackTrace(TRUE); }
 127     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 128     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 129     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 130     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 131     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 132     | tFINISH tEOL             { DEBUG_CurrThread->dbg_exec_count = 0;
 133                                  DEBUG_CurrThread->dbg_exec_mode = EXEC_FINISH; return 0; }
 134     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 135     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 136     | tDIR tEOL                { DEBUG_NukePath(); }
 137     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 138     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 139     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 140     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 141     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 142     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 143     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 144     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 145     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 146     | tSYMBOLFILE pathname tEOL{ DEBUG_ReadSymbolTable($2); }
 147     | tWHATIS expr_addr tEOL   { DEBUG_PrintType(&$2); DEBUG_FreeExprMem(); }
 148     | list_command
 149     | disassemble_command
 150     | set_command
 151     | x_command
 152     | print_command
 153     | break_command
 154     | watch_command
 155     | info_command
 156     | walk_command
 157
 158 set_command:
 159       tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 160                                              DEBUG_FreeExprMem(); }
 161
 162 pathname:
 163       tIDENTIFIER              { $$ = $1; }
 164     | tPATH                    { $$ = $1; }
 165
 166 disassemble_command:
 167       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 168     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 169     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 170
 171 list_command:
 172       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 173     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 174     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 175     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 176     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 177
 178 list_arg:
 179       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 180     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 181     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 182     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 183     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2.addr, FALSE, NULL,
 184                                                         0, & $$ );
 185                                              DEBUG_FreeExprMem(); }
 186
 187 x_command:
 188       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 189                                              DEBUG_FreeExprMem(); }
 190     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 191                                              DEBUG_FreeExprMem(); }
 192
 193 print_command:
 194       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 195                                              DEBUG_FreeExprMem(); }
 196     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 197                                              DEBUG_FreeExprMem(); }
 198
 199 break_command:
 200       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3, NULL );
 201                                              DEBUG_FreeExprMem(); }
 202     | tBREAK tIDENTIFIER tEOL  { DBG_VALUE value;
 203                                  if( DEBUG_GetSymbolValue($2, -1, &value, TRUE) )
 204                                    {
 205                                      DEBUG_AddBreakpoint( &value, NULL );
 206                                    }
 207                                  else
 208                                    {
 209                                      DEBUG_Printf(DBG_CHN_MESG,"Unable to add breakpoint\n");
 210                                    }
 211                                 }
 212     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_VALUE value;
 213                                  if( DEBUG_GetSymbolValue($2, $4, &value, TRUE) )
 214                                    {
 215                                      DEBUG_AddBreakpoint( &value, NULL );
 216                                    }
 217                                  else
 218                                    {
 219                                      DEBUG_Printf(DBG_CHN_MESG,"Unable to add breakpoint\n");
 220                                    }
 221                                }
 222     | tBREAK tNUM tEOL         { struct name_hash *nh;
 223                                  DBG_VALUE value;
 224                                  DEBUG_GetCurrentAddress( &value.addr );
 225                                  DEBUG_FindNearestSymbol(&value.addr, TRUE,
 226                                                          &nh, 0, NULL);
 227                                  if( nh != NULL )
 228                                    {
 229                                      DEBUG_GetLineNumberAddr(nh, $2, &value.addr, TRUE);
 230                                      value.type = NULL;
 231                                      value.cookie = DV_TARGET;
 232                                      DEBUG_AddBreakpoint( &value, NULL );
 233                                    }
 234                                  else
 235                                    {
 236                                      DEBUG_Printf(DBG_CHN_MESG,"Unable to add breakpoint\n");
 237                                    }
 238                                }
 239
 240     | tBREAK tEOL              { DBG_VALUE value;
 241                                  DEBUG_GetCurrentAddress( &value.addr );
 242                                  value.type = NULL;
 243                                  value.cookie = DV_TARGET;
 244                                  DEBUG_AddBreakpoint( &value, NULL );
 245                                }
 246
 247 watch_command:
 248       tWATCH '*' expr_addr tEOL { DEBUG_AddWatchpoint( &$3, 1 );
 249                                              DEBUG_FreeExprMem(); }
 250     | tWATCH tIDENTIFIER tEOL  { DBG_VALUE value;
 251                                  if( DEBUG_GetSymbolValue($2, -1, &value, TRUE) )
 252                                      DEBUG_AddWatchpoint( &value, 1 );
 253                                  else
 254                                      DEBUG_Printf(DBG_CHN_MESG,"Unable to add breakpoint\n");
 255                                 }
 256
 257 info_command:
 258       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 259     | tINFO tCLASS tSTRING tEOL { DEBUG_InfoClass( $3 ); DEBUG_FreeExprMem(); }
 260     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 261     | tINFO tMODULE expr_value tEOL   { DEBUG_DumpModule( $3 ); DEBUG_FreeExprMem(); }
 262     | tINFO tQUEUE expr_value tEOL    { DEBUG_DumpQueue( $3 ); DEBUG_FreeExprMem(); }
 263     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 264     | tINFO tSEGMENTS expr_value tEOL { DEBUG_InfoSegments( $3, 1 ); DEBUG_FreeExprMem(); }
 265     | tINFO tSEGMENTS tEOL      { DEBUG_InfoSegments( 0, -1 ); }
 266     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 267     | tINFO tMAPS tEOL          { DEBUG_InfoVirtual(); }
 268     | tINFO tWND expr_value tEOL      { DEBUG_InfoWindow( (HWND)$3 );
 269                                              DEBUG_FreeExprMem(); }
 270     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 271     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 272
 273 walk_command:
 274       tWALK tCLASS tEOL         { DEBUG_WalkClasses(); }
 275     | tWALK tMODULE tEOL        { DEBUG_WalkModules(); }
 276     | tWALK tQUEUE tEOL         { DEBUG_WalkQueues(); }
 277     | tWALK tWND tEOL           { DEBUG_WalkWindows( 0, 0 ); }
 278     | tWALK tWND tNUM tEOL      { DEBUG_WalkWindows( $3, 0 ); }
 279     | tWALK tPROCESS tEOL       { DEBUG_WalkProcess(); }
 280     | tWALK tTHREAD tEOL        { DEBUG_WalkThreads(); }
 281     | tWALK tMODREF expr_value tEOL   { DEBUG_WalkModref( $3 ); }
 282
 283
 284 type_cast:
 285       '(' type_expr ')'         { $$ = $2; }
 286
 287 type_expr:
 288       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 289     |  tINT                     { $$ = DEBUG_TypeCast(DT_BASIC, "int"); }
 290     | tCHAR                     { $$ = DEBUG_TypeCast(DT_BASIC, "char"); }
 291     | tLONG tINT                { $$ = DEBUG_TypeCast(DT_BASIC, "long int"); }
 292     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned int"); }
 293     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(DT_BASIC, "long unsigned int"); }
 294     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(DT_BASIC, "long long int"); }
 295     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(DT_BASIC, "long long unsigned int"); }
 296     | tSHORT tINT               { $$ = DEBUG_TypeCast(DT_BASIC, "short int"); }
 297     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(DT_BASIC, "short unsigned int"); }
 298     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(DT_BASIC, "signed char"); }
 299     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned char"); }
 300     | tFLOAT                    { $$ = DEBUG_TypeCast(DT_BASIC, "float"); }
 301     | tDOUBLE                   { $$ = DEBUG_TypeCast(DT_BASIC, "double"); }
 302     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(DT_BASIC, "long double"); }
 303     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 304     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 305     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(DT_ENUM, $2); }
 306
 307 expr_addr:
 308       expr                      { $$ = DEBUG_EvalExpr($1); }
 309
 310 expr_value:
 311       expr                      { DBG_VALUE     value = DEBUG_EvalExpr($1);
 312                                   /* expr_value is typed as an integer */
 313                                   $$ = DEBUG_ReadMemory(&value); }
 314
 315 /*
 316  * The expr rule builds an expression tree.  When we are done, we call
 317  * EvalExpr to evaluate the value of the expression.  The advantage of
 318  * the two-step approach is that it is possible to save expressions for
 319  * use in 'display' commands, and in conditional watchpoints.
 320  */
 321 expr:
 322       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 323     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 324     | tINTVAR                    { $$ = DEBUG_IntVarExpr($1); }
 325     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 326     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 327     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 328     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 329     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 330     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3, $5); }
 331     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 332     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 4, $3, $5, $7, $9); }
 333     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 5, $3, $5, $7, $9, $11); }
 334     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 335     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 336     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 337     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 338     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 339     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 340     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 341     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 342     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 343     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 344     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 345     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 346     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 347     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 348     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 349     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 350     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 351     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 352     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 353     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 354     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 355     | '+' expr %prec OP_SIGN     { $$ = $2; }
 356     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 357     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 358     | '(' expr ')'               { $$ = $2; }
 359     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 360     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 361     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 362
 363 /*
 364  * The lvalue rule builds an expression tree.  This is a limited form
 365  * of expression that is suitable to be used as an lvalue.
 366  */
 367 lval_addr:
 368     lval                         { $$ = DEBUG_EvalExpr($1); }
 369
 370 lval:
 371       lvalue                     { $$ = $1; }
 372     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 373
 374 lvalue:
 375       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 376     | tINTVAR                    { $$ = DEBUG_IntVarExpr($1); }
 377     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 378     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 379     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 380     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 381
 382 %%
 383
 384 static void issue_prompt(void)
 385 {
 386 #ifdef DONT_USE_READLINE
 387    DEBUG_Printf(DBG_CHN_MESG, "Wine-dbg>");
 388 #endif
 389 }
 390
 391 static void mode_command(int newmode)
 392 {
 393     if ((newmode == 16) || (newmode == 32)) DEBUG_CurrThread->dbg_mode = newmode;
 394     else DEBUG_Printf(DBG_CHN_MESG,"Invalid mode (use 16 or 32)\n");
 395 }
 396
 397 void DEBUG_Exit(DWORD ec)
 398 {
 399    ExitProcess(ec);
 400 }
 401
 402 static WINE_EXCEPTION_FILTER(wine_dbg_cmd)
 403 {
 404    DEBUG_Printf(DBG_CHN_MESG, "\nwine_dbg_cmd: ");
 405    switch (GetExceptionCode()) {
 406    case DEBUG_STATUS_INTERNAL_ERROR:
 407       DEBUG_Printf(DBG_CHN_MESG, "WineDbg internal error\n");
 408       break;
 409    case DEBUG_STATUS_NO_SYMBOL:
 410       DEBUG_Printf(DBG_CHN_MESG, "Undefined symbol\n");
 411       break;
 412    case DEBUG_STATUS_DIV_BY_ZERO:
 413       DEBUG_Printf(DBG_CHN_MESG, "Division by zero\n");
 414       break;
 415    case DEBUG_STATUS_BAD_TYPE:
 416       DEBUG_Printf(DBG_CHN_MESG, "No type or type mismatch\n");
 417       break;
 418    default:
 419       DEBUG_Printf(DBG_CHN_MESG, "Exception %lx\n", GetExceptionCode());
 420       break;
 421    }
 422
 423    return EXCEPTION_EXECUTE_HANDLER;
 424 }
 425
 426 /***********************************************************************
 427  *           DEBUG_Main
 428  *
 429  * Debugger main loop.
 430  */
 431 BOOL DEBUG_Main( BOOL is_debug, BOOL force, DWORD code )
 432 {
 433     int newmode;
 434     BOOL ret_ok;
 435     char ch;
 436
 437 #ifdef YYDEBUG
 438     yydebug = 0;
 439 #endif
 440
 441     yyin = stdin;
 442
 443     DEBUG_SuspendExecution();
 444
 445     if (!is_debug)
 446     {
 447 #ifdef __i386__
 448         if (DEBUG_IsSelectorSystem(DEBUG_context.SegCs))
 449             DEBUG_Printf( DBG_CHN_MESG, " in 32-bit code (0x%08lx).\n", DEBUG_context.Eip );
 450         else
 451             DEBUG_Printf( DBG_CHN_MESG, " in 16-bit code (%04x:%04lx).\n",
 452                           (WORD)DEBUG_context.SegCs, DEBUG_context.Eip );
 453 #else
 454         DEBUG_Printf( DBG_CHN_MESG, " (%p).\n", GET_IP(&DEBUG_context) );
 455 #endif
 456     }
 457
 458     DEBUG_LoadEntryPoints("Loading new modules symbols:\n");
 459
 460     if (force || !(is_debug && DEBUG_ShouldContinue( code,
 461                                                      DEBUG_CurrThread->dbg_exec_mode,
 462                                                      &DEBUG_CurrThread->dbg_exec_count )))
 463     {
 464         DBG_ADDR addr;
 465         DEBUG_GetCurrentAddress( &addr );
 466
 467 #ifdef __i386__
 468         switch (newmode = DEBUG_GetSelectorType(addr.seg)) {
 469         case 16: case 32: break;
 470         default: DEBUG_Printf(DBG_CHN_MESG, "Bad CS (%ld)\n", addr.seg); newmode = 32;
 471         }
 472 #else
 473         newmode = 32;
 474 #endif
 475         if (newmode != DEBUG_CurrThread->dbg_mode)
 476             DEBUG_Printf(DBG_CHN_MESG,"In %d bit mode.\n", DEBUG_CurrThread->dbg_mode = newmode);
 477
 478         DEBUG_DoDisplay();
 479
 480         if (is_debug || force)
 481         {
 482           /*
 483            * Do a quiet backtrace so that we have an idea of what the situation
 484            * is WRT the source files.
 485            */
 486             DEBUG_BackTrace(FALSE);
 487         }
 488         else
 489         {
 490             /* This is a real crash, dump some info */
 491             DEBUG_InfoRegisters();
 492             DEBUG_InfoStack();
 493 #ifdef __i386__
 494             if (DEBUG_CurrThread->dbg_mode == 16)
 495             {
 496                 DEBUG_InfoSegments( DEBUG_context.SegDs >> 3, 1 );
 497                 if (DEBUG_context.SegEs != DEBUG_context.SegDs)
 498                     DEBUG_InfoSegments( DEBUG_context.SegEs >> 3, 1 );
 499             }
 500             DEBUG_InfoSegments( DEBUG_context.SegFs >> 3, 1 );
 501 #endif
 502             DEBUG_BackTrace(TRUE);
 503         }
 504
 505         if (!is_debug ||
 506             (DEBUG_CurrThread->dbg_exec_mode == EXEC_STEPI_OVER) ||
 507             (DEBUG_CurrThread->dbg_exec_mode == EXEC_STEPI_INSTR))
 508         {
 509             /* Show where we crashed */
 510             curr_frame = 0;
 511             DEBUG_PrintAddress( &addr, DEBUG_CurrThread->dbg_mode, TRUE );
 512             DEBUG_Printf(DBG_CHN_MESG,":  ");
 513             DEBUG_Disasm( &addr, TRUE );
 514             DEBUG_Printf( DBG_CHN_MESG, "\n" );
 515         }
 516
 517         ret_ok = 0;
 518         do
 519         {
 520             __TRY
 521             {
 522                issue_prompt();
 523                if (yyparse()) {
 524                   DEBUG_CurrThread->dbg_exec_mode = EXEC_KILL;
 525                   ret_ok = TRUE;
 526                } else {
 527                   flush_symbols();
 528
 529                   DEBUG_GetCurrentAddress( &addr );
 530                   ret_ok = DEBUG_ValidateRegisters() &&
 531                      DEBUG_READ_MEM_VERBOSE((void*)DEBUG_ToLinear(&addr), &ch, 1);
 532                }
 533             }
 534             __EXCEPT(wine_dbg_cmd)
 535             {
 536                ret_ok = FALSE;
 537             }
 538             __ENDTRY;
 539
 540         } while (!ret_ok);
 541     }
 542
 543     DEBUG_CurrThread->dbg_exec_mode = DEBUG_RestartExecution( DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count );
 544     /*
 545      * This will have gotten absorbed into the breakpoint info
 546      * if it was used.  Otherwise it would have been ignored.
 547      * In any case, we don't mess with it any more.
 548      */
 549     if (DEBUG_CurrThread->dbg_exec_mode == EXEC_CONT || DEBUG_CurrThread->dbg_exec_mode == EXEC_PASS)
 550         DEBUG_CurrThread->dbg_exec_count = 0;
 551
 552     return (DEBUG_CurrThread->dbg_exec_mode == EXEC_PASS) ? DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE;
 553 }
 554
 555 int yyerror(char* s)
 556 {
 557    DEBUG_Printf(DBG_CHN_MESG,"%s\n", s);
 558    return 0;
 559 }