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  */
   8
   9 #include <stdio.h>
  10 #include <signal.h>
  11 #include <sys/stat.h>
  12 #include <unistd.h>
  13 #include "class.h"
  14 #include "module.h"
  15 #include "options.h"
  16 #include "queue.h"
  17 #include "win.h"
  18 #include "winnt.h"
  19 #include "debugger.h"
  20 #include "neexe.h"
  21
  22 #include "expr.h"
  23
  24 extern FILE * yyin;
  25 unsigned int dbg_mode = 0;
  26 int curr_frame = 0;
  27
  28 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  29 static int dbg_exec_count = 0;
  30
  31 void issue_prompt(void);
  32 void mode_command(int);
  33 void flush_symbols(void);
  34 int yylex(void);
  35 int yyerror(char *);
  36
  37 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  38
  39 %}
  40
  41 %union
  42 {
  43     DBG_ADDR         address;
  44     enum debug_regs  reg;
  45     char *           string;
  46     int              integer;
  47     struct list_id   listing;
  48     struct expr *    expression;
  49     struct datatype * type;
  50 }
  51
  52 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  53 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT
  54 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  55 %token tEOL tSTRING
  56 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  57 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  58 %token <string> tPATH
  59 %token <string> tIDENTIFIER tSTRING
  60 %token <integer> tNUM tFORMAT
  61 %token <reg> tREG
  62
  63 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  64 %token tSTRUCT tUNION tENUM
  65
  66 /* %left ',' */
  67 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  68          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  69          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  70 /* %left OP_COND */ /* ... ? ... : ... */
  71 %left OP_LOR
  72 %left OP_LAND
  73 %left '|'
  74 %left '^'
  75 %left '&'
  76 %left OP_EQ OP_NE
  77 %left '<' '>' OP_LE OP_GE
  78 %left OP_SHL OP_SHR
  79 %left '+' '-'
  80 %left '*' '/' '%'
  81 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
  82 %left '.' '[' OP_DRF
  83 %nonassoc ':'
  84
  85 %type <expression> expr lval lvalue
  86 %type <type> type_cast type_expr
  87 %type <address> expr_addr lval_addr
  88 %type <integer> expr_value
  89 %type <string> pathname
  90
  91 %type <listing> list_arg
  92
  93 %%
  94
  95 input: line                    { issue_prompt(); }
  96     | input line               { issue_prompt(); }
  97
  98 line: command
  99     | tEOL
 100     | error tEOL               { yyerrok; }
 101
 102 command:
 103       tQUIT tEOL               { exit(0); }
 104     | tHELP tEOL               { DEBUG_Help(); }
 105     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 106     | tCONT tEOL               { dbg_exec_count = 1;
 107                                  dbg_exec_mode = EXEC_CONT; return 0; }
 108     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 109                                  dbg_exec_mode = EXEC_CONT; return 0; }
 110     | tSTEP tEOL               { dbg_exec_count = 1;
 111                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 112     | tNEXT tEOL               { dbg_exec_count = 1;
 113                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 114     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 115                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 116     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 117                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 118     | tSTEPI tEOL              { dbg_exec_count = 1;
 119                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 120     | tNEXTI tEOL              { dbg_exec_count = 1;
 121                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 122     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 123                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 124     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 125                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 126     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 127     | tMODE tNUM tEOL          { mode_command($2); }
 128     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 129     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 130     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 131     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 132     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 133     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 134     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 135     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 136     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 137     | tFINISH tEOL             { dbg_exec_count = 0;
 138                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 139     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 140     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 141     | tDIR tEOL                { DEBUG_NukePath(); }
 142     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 143     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 144     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 145     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 146     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 147     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 148     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 149     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 150     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 151     | list_command
 152     | disassemble_command
 153     | set_command
 154     | x_command
 155     | print_command
 156     | break_command
 157     | info_command
 158     | walk_command
 159
 160 set_command:
 161       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 162                                              DEBUG_FreeExprMem(); }
 163     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 164                                              DEBUG_FreeExprMem(); }
 165
 166 pathname:
 167       tIDENTIFIER                    { $$ = $1; }
 168     | tPATH                          { $$ = $1; }
 169
 170 disassemble_command:
 171       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 172     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 173     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 174
 175 list_command:
 176       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 177     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 178     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 179     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 180     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 181
 182 list_arg:
 183       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 184     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 185     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 186     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 187     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 188                                                         0, & $$ );
 189                                              DEBUG_FreeExprMem(); }
 190
 191 x_command:
 192       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 193                                              DEBUG_FreeExprMem(); }
 194     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 195                                              DEBUG_FreeExprMem(); }
 196
 197 print_command:
 198       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 199                                              DEBUG_FreeExprMem(); }
 200     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 201                                              DEBUG_FreeExprMem(); }
 202
 203 break_command:
 204       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 205                                              DEBUG_FreeExprMem(); }
 206     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 207                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 208                                    {
 209                                      DEBUG_AddBreakpoint( &addr );
 210                                    }
 211                                  else
 212                                    {
 213                                      fprintf(stderr,"Unable to add breakpoint\n");
 214                                    }
 215                                 }
 216     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 217                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 218                                    {
 219                                      DEBUG_AddBreakpoint( &addr );
 220                                    }
 221                                  else
 222                                    {
 223                                      fprintf(stderr,"Unable to add breakpoint\n");
 224                                    }
 225                                 }
 226     | tBREAK tNUM tEOL         { struct name_hash *nh;
 227                                  DBG_ADDR addr = { NULL,
 228                                                    CS_reg(&DEBUG_context),
 229                                                    EIP_reg(&DEBUG_context) };
 230
 231                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 232                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 233                                                          &nh, 0, NULL);
 234                                  if( nh != NULL )
 235                                    {
 236                                      DEBUG_GetLineNumberAddr(nh,
 237                                                       $2, &addr, TRUE);
 238                                      DEBUG_AddBreakpoint( &addr );
 239                                    }
 240                                  else
 241                                    {
 242                                      fprintf(stderr,"Unable to add breakpoint\n");
 243                                    }
 244                                }
 245
 246     | tBREAK tEOL              { DBG_ADDR addr = { NULL,
 247                                                    CS_reg(&DEBUG_context),
 248                                                    EIP_reg(&DEBUG_context) };
 249                                  DEBUG_AddBreakpoint( &addr );
 250                                }
 251
 252 info_command:
 253       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 254     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (CLASS *)$3 );
 255                                              DEBUG_FreeExprMem(); }
 256     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 257     | tINFO tMODULE expr_value tEOL   { NE_DumpModule( $3 );
 258                                              DEBUG_FreeExprMem(); }
 259     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 260                                              DEBUG_FreeExprMem(); }
 261     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 262     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 263                                              DEBUG_FreeExprMem(); }
 264     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 265     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 266     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 267     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 268                                              DEBUG_FreeExprMem(); }
 269     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 270     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 271
 272 walk_command:
 273       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 274     | tWALK tMODULE tEOL        { NE_WalkModules(); }
 275     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 276     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 277     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 278
 279
 280 type_cast:
 281       '(' type_expr ')'         { $$ = $2; }
 282
 283 type_expr:
 284       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 285     |  tINT                     { $$ = DEBUG_TypeCast(BASIC, "int"); }
 286     | tCHAR                     { $$ = DEBUG_TypeCast(BASIC, "char"); }
 287     | tLONG tINT                { $$ = DEBUG_TypeCast(BASIC, "long int"); }
 288     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(BASIC, "unsigned int"); }
 289     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(BASIC, "long unsigned int"); }
 290     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(BASIC, "long long int"); }
 291     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(BASIC, "long long unsigned int"); }
 292     | tSHORT tINT               { $$ = DEBUG_TypeCast(BASIC, "short int"); }
 293     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(BASIC, "short unsigned int"); }
 294     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(BASIC, "signed char"); }
 295     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(BASIC, "unsigned char"); }
 296     | tFLOAT                    { $$ = DEBUG_TypeCast(BASIC, "float"); }
 297     | tDOUBLE                   { $$ = DEBUG_TypeCast(BASIC, "double"); }
 298     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(BASIC, "long double"); }
 299     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(STRUCT, $2); }
 300     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(STRUCT, $2); }
 301     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(ENUM, $2); }
 302
 303 expr_addr:
 304     expr                         { $$ = DEBUG_EvalExpr($1); }
 305
 306 expr_value:
 307       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 308                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 309 /*
 310  * The expr rule builds an expression tree.  When we are done, we call
 311  * EvalExpr to evaluate the value of the expression.  The advantage of
 312  * the two-step approach is that it is possible to save expressions for
 313  * use in 'display' commands, and in conditional watchpoints.
 314  */
 315 expr:
 316       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 317     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 318     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 319     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 320     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 321     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 322     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 323     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 324     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 325                                                                $5); }
 326     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 327     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 328     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 329     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 330     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 331     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 332     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 333     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 334     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 335     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 336     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 337     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 338     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 339     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 340     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 341     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 342     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 343     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 344     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 345     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 346     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 347     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 348     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 349     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 350     | '+' expr %prec OP_SIGN     { $$ = $2; }
 351     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 352     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 353     | '(' expr ')'               { $$ = $2; }
 354     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 355     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 356     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 357
 358 /*
 359  * The lvalue rule builds an expression tree.  This is a limited form
 360  * of expression that is suitable to be used as an lvalue.
 361  */
 362 lval_addr:
 363     lval                         { $$ = DEBUG_EvalExpr($1); }
 364
 365 lval:
 366       lvalue                     { $$ = $1; }
 367     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 368
 369 lvalue:
 370       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 371     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 372     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 373     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 374     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 375     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 376
 377 %%
 378
 379 void
 380 issue_prompt(){
 381 #ifdef DONT_USE_READLINE
 382         fprintf(stderr,"Wine-dbg>");
 383 #endif
 384 }
 385
 386 void mode_command(int newmode)
 387 {
 388     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 389     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 390 }
 391
 392
 393 /***********************************************************************
 394  *           DEBUG_Main
 395  *
 396  * Debugger main loop.
 397  */
 398 static void DEBUG_Main( int signal )
 399 {
 400     static int loaded_symbols = 0;
 401     static BOOL32 in_debugger = FALSE;
 402     char SymbolTableFile[256];
 403     int newmode;
 404     BOOL32 ret_ok;
 405 #ifdef YYDEBUG
 406     yydebug = 0;
 407 #endif
 408
 409     if (in_debugger)
 410     {
 411         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 412         exit(1);
 413     }
 414     in_debugger = TRUE;
 415     yyin = stdin;
 416
 417     DEBUG_SetBreakpoints( FALSE );
 418
 419     if (!loaded_symbols)
 420     {
 421         loaded_symbols++;
 422
 423         /*
 424          * Initialize the type handling stuff.
 425          */
 426         DEBUG_InitTypes();
 427
 428         /*
 429          * In some cases we can read the stabs information directly
 430          * from the executable.  If this is the case, we don't need
 431          * to bother with trying to read a symbol file, as the stabs
 432          * also have line number and local variable information.
 433          * As long as gcc is used for the compiler, stabs will
 434          * be the default.  On SVr4, DWARF could be used, but we
 435          * don't grok that yet, and in this case we fall back to using
 436          * the wine.sym file.
 437          */
 438         fprintf(stderr,"Loading symbols: ");
 439         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 440         {
 441             char *symfilename = "wine.sym";
 442             struct stat statbuf;
 443             if (-1 == stat(symfilename, &statbuf) )
 444                 symfilename = LIBDIR "wine.sym";
 445
 446             PROFILE_GetWineIniString( "wine", "SymbolTableFile", symfilename,
 447                                      SymbolTableFile, sizeof(SymbolTableFile));
 448             DEBUG_ReadSymbolTable( SymbolTableFile );
 449         }
 450
 451         DEBUG_LoadEntryPoints();
 452         DEBUG_ProcessDeferredDebug();
 453         fprintf(stderr,"\n");
 454     }
 455
 456 #if 0
 457     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 458             EIP_reg(&DEBUG_context),
 459             dbg_exec_mode, dbg_exec_count);
 460
 461     sleep(1);
 462 #endif
 463
 464     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 465                                                       &dbg_exec_count ))
 466     {
 467         DBG_ADDR addr;
 468
 469         addr.seg = CS_reg(&DEBUG_context);
 470         addr.off = EIP_reg(&DEBUG_context);
 471         addr.type = NULL;
 472         DBG_FIX_ADDR_SEG( &addr, 0 );
 473
 474         /* Put the display in a correct state */
 475
 476         XUngrabPointer( display, CurrentTime );
 477         XUngrabServer( display );
 478         XFlush( display );
 479
 480         newmode = IS_SELECTOR_32BIT(addr.seg) ? 32 : 16;
 481         if (newmode != dbg_mode)
 482             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 483
 484         DEBUG_DoDisplay();
 485
 486         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 487         {
 488             DEBUG_InfoRegisters();
 489             DEBUG_InfoStack();
 490             if (dbg_mode == 16)
 491             {
 492                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 493                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 494                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 495             }
 496             DEBUG_BackTrace();
 497         }
 498         else
 499         {
 500           /*
 501            * Do a quiet backtrace so that we have an idea of what the situation
 502            * is WRT the source files.
 503            */
 504             DEBUG_SilentBackTrace();
 505         }
 506
 507         if ((signal != SIGTRAP) ||
 508             (dbg_exec_mode == EXEC_STEPI_OVER) ||
 509             (dbg_exec_mode == EXEC_STEPI_INSTR))
 510         {
 511             /* Show where we crashed */
 512             curr_frame = 0;
 513             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 514             fprintf(stderr,":  ");
 515             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 516               {
 517                 DEBUG_Disasm( &addr, TRUE );
 518                 fprintf(stderr,"\n");
 519               }
 520         }
 521
 522         ret_ok = 0;
 523         do
 524         {
 525             issue_prompt();
 526             yyparse();
 527             flush_symbols();
 528             addr.seg = CS_reg(&DEBUG_context);
 529             addr.off = EIP_reg(&DEBUG_context);
 530             DBG_FIX_ADDR_SEG( &addr, 0 );
 531             ret_ok = DEBUG_ValidateRegisters();
 532             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 533         } while (!ret_ok);
 534     }
 535
 536     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 537     /*
 538      * This will have gotten absorbed into the breakpoint info
 539      * if it was used.  Otherwise it would have been ignored.
 540      * In any case, we don't mess with it any more.
 541      */
 542     if( dbg_exec_mode == EXEC_CONT )
 543       {
 544         dbg_exec_count = 0;
 545       }
 546
 547     in_debugger = FALSE;
 548 }
 549
 550
 551 /***********************************************************************
 552  *           DebugBreak32   (KERNEL32)
 553  */
 554 void DebugBreak32( CONTEXT *regs )
 555 {
 556     const char *module = MODULE_GetModuleName( GetCurrentTask() );
 557     fprintf( stderr, "%s called DebugBreak\n", module ? module : "???" );
 558     DEBUG_context = *regs;
 559     DEBUG_Main( SIGTRAP );
 560 }
 561
 562 /***********************************************************************
 563  *           DebugBreak16   (KERNEL.203)
 564  */
 565 void DebugBreak16( CONTEXT *regs )
 566 {
 567     const char *module = MODULE_GetModuleName( GetCurrentTask() );
 568     fprintf( stderr, "%s called DebugBreak\n", module ? module : "???" );
 569     DEBUG_context = *regs;
 570     DEBUG_Main( SIGTRAP );
 571 }
 572
 573
 574 void wine_debug( int signal, SIGCONTEXT *regs )
 575 {
 576     DEBUG_SetSigContext( regs );
 577 #if 0
 578     DWORD *stack = (DWORD *)ESP_reg(&DEBUG_context);
 579     *(--stack) = 0;
 580     *(--stack) = 0;
 581     *(--stack) = EH_NONCONTINUABLE;
 582     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 583     *(--stack) = EIP_reg(&DEBUG_context);
 584     ESP_reg(&DEBUG_context) = (DWORD)stack;
 585     EIP_reg(&DEBUG_context) = GetProcAddress32( GetModuleHandle("KERNEL32"),
 586                                                 "RaiseException" );
 587 #endif
 588     DEBUG_Main( signal );
 589     DEBUG_GetSigContext( regs );
 590 }
 591
 592 int yyerror(char * s)
 593 {
 594         fprintf(stderr,"%s\n", s);
 595         return 0;
 596 }
 597