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 <unistd.h>
  12 #include "class.h"
  13 #include "module.h"
  14 #include "options.h"
  15 #include "queue.h"
  16 #include "win.h"
  17 #include "winnt.h"
  18 #include "debugger.h"
  19
  20 #include "expr.h"
  21
  22 extern FILE * yyin;
  23 unsigned int dbg_mode = 0;
  24 int curr_frame = 0;
  25
  26 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  27 static int dbg_exec_count = 0;
  28
  29 void issue_prompt(void);
  30 void mode_command(int);
  31 void flush_symbols(void);
  32 int yylex(void);
  33 int yyerror(char *);
  34
  35 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  36
  37 %}
  38
  39 %union
  40 {
  41     DBG_ADDR         address;
  42     enum debug_regs  reg;
  43     char *           string;
  44     int              integer;
  45     struct list_id   listing;
  46     struct expr *    expression;
  47     struct datatype * type;
  48 }
  49
  50 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  51 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT
  52 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  53 %token tEOL tSTRING
  54 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  55 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  56 %token <string> tPATH
  57 %token <string> tIDENTIFIER tSTRING
  58 %token <integer> tNUM tFORMAT
  59 %token <reg> tREG
  60
  61 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  62 %token tSTRUCT tUNION tENUM
  63
  64 /* %left ',' */
  65 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  66          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  67          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  68 /* %left OP_COND */ /* ... ? ... : ... */
  69 %left OP_LOR
  70 %left OP_LAND
  71 %left '|'
  72 %left '^'
  73 %left '&'
  74 %left OP_EQ OP_NE
  75 %left '<' '>' OP_LE OP_GE
  76 %left OP_SHL OP_SHR
  77 %left '+' '-'
  78 %left '*' '/' '%'
  79 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
  80 %left '.' '[' OP_DRF
  81 %nonassoc ':'
  82
  83 %type <expression> expr lval lvalue
  84 %type <type> type_cast type_expr
  85 %type <address> expr_addr lval_addr
  86 %type <integer> expr_value
  87 %type <string> pathname
  88
  89 %type <listing> list_arg
  90
  91 %%
  92
  93 input: line                    { issue_prompt(); }
  94     | input line               { issue_prompt(); }
  95
  96 line: command
  97     | tEOL
  98     | error tEOL               { yyerrok; }
  99
 100 command:
 101       tQUIT tEOL               { exit(0); }
 102     | tHELP tEOL               { DEBUG_Help(); }
 103     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 104     | tCONT tEOL               { dbg_exec_count = 1;
 105                                  dbg_exec_mode = EXEC_CONT; return 0; }
 106     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 107                                  dbg_exec_mode = EXEC_CONT; return 0; }
 108     | tSTEP tEOL               { dbg_exec_count = 1;
 109                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 110     | tNEXT tEOL               { dbg_exec_count = 1;
 111                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 112     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 113                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 114     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 115                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 116     | tSTEPI tEOL              { dbg_exec_count = 1;
 117                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 118     | tNEXTI tEOL              { dbg_exec_count = 1;
 119                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 120     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 121                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 122     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 123                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 124     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 125     | tMODE tNUM tEOL          { mode_command($2); }
 126     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 127     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 128     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 129     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 130     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 131     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 132     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 133     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 134     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 135     | tFINISH tEOL             { dbg_exec_count = 0;
 136                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 137     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 138     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 139     | tDIR tEOL                { DEBUG_NukePath(); }
 140     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 141     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 142     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 143     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 144     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 145     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 146     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 147     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 148     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 149     | list_command
 150     | disassemble_command
 151     | set_command
 152     | x_command
 153     | print_command
 154     | break_command
 155     | info_command
 156     | walk_command
 157
 158 set_command:
 159       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 160                                              DEBUG_FreeExprMem(); }
 161     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 162                                              DEBUG_FreeExprMem(); }
 163
 164 pathname:
 165       tIDENTIFIER                    { $$ = $1; }
 166     | tPATH                          { $$ = $1; }
 167
 168 disassemble_command:
 169       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 170     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 171     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 172
 173 list_command:
 174       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 175     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 176     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 177     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 178     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 179
 180 list_arg:
 181       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 182     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 183     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 184     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 185     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 186                                                         0, & $$ );
 187                                              DEBUG_FreeExprMem(); }
 188
 189 x_command:
 190       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 191                                              DEBUG_FreeExprMem(); }
 192     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 193                                              DEBUG_FreeExprMem(); }
 194
 195 print_command:
 196       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 197                                              DEBUG_FreeExprMem(); }
 198     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 199                                              DEBUG_FreeExprMem(); }
 200
 201 break_command:
 202       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 203                                              DEBUG_FreeExprMem(); }
 204     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 205                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 206                                    {
 207                                      DEBUG_AddBreakpoint( &addr );
 208                                    }
 209                                  else
 210                                    {
 211                                      fprintf(stderr,"Unable to add breakpoint\n");
 212                                    }
 213                                 }
 214     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 215                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 216                                    {
 217                                      DEBUG_AddBreakpoint( &addr );
 218                                    }
 219                                  else
 220                                    {
 221                                      fprintf(stderr,"Unable to add breakpoint\n");
 222                                    }
 223                                 }
 224     | tBREAK tNUM tEOL         { struct name_hash *nh;
 225                                  DBG_ADDR addr = { NULL,
 226                                                    CS_reg(&DEBUG_context),
 227                                                    EIP_reg(&DEBUG_context) };
 228
 229                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 230                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 231                                                          &nh, 0, NULL);
 232                                  if( nh != NULL )
 233                                    {
 234                                      DEBUG_GetLineNumberAddr(nh,
 235                                                       $2, &addr, TRUE);
 236                                      DEBUG_AddBreakpoint( &addr );
 237                                    }
 238                                  else
 239                                    {
 240                                      fprintf(stderr,"Unable to add breakpoint\n");
 241                                    }
 242                                }
 243
 244     | tBREAK tEOL              { DBG_ADDR addr = { NULL,
 245                                                    CS_reg(&DEBUG_context),
 246                                                    EIP_reg(&DEBUG_context) };
 247                                  DEBUG_AddBreakpoint( &addr );
 248                                }
 249
 250 info_command:
 251       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 252     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (CLASS *)$3 );
 253                                              DEBUG_FreeExprMem(); }
 254     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 255     | tINFO tMODULE expr_value tEOL   { MODULE_DumpModule( $3 );
 256                                              DEBUG_FreeExprMem(); }
 257     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 258                                              DEBUG_FreeExprMem(); }
 259     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 260     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 261                                              DEBUG_FreeExprMem(); }
 262     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 263     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 264     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 265     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 266                                              DEBUG_FreeExprMem(); }
 267     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 268     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 269
 270 walk_command:
 271       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 272     | tWALK tMODULE tEOL        { MODULE_WalkModules(); }
 273     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 274     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 275     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 276
 277
 278 type_cast:
 279       '(' type_expr ')'         { $$ = $2; }
 280
 281 type_expr:
 282       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 283     |  tINT                     { $$ = DEBUG_TypeCast(BASIC, "int"); }
 284     | tCHAR                     { $$ = DEBUG_TypeCast(BASIC, "char"); }
 285     | tLONG tINT                { $$ = DEBUG_TypeCast(BASIC, "long int"); }
 286     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(BASIC, "unsigned int"); }
 287     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(BASIC, "long unsigned int"); }
 288     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(BASIC, "long long int"); }
 289     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(BASIC, "long long unsigned int"); }
 290     | tSHORT tINT               { $$ = DEBUG_TypeCast(BASIC, "short int"); }
 291     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(BASIC, "short unsigned int"); }
 292     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(BASIC, "signed char"); }
 293     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(BASIC, "unsigned char"); }
 294     | tFLOAT                    { $$ = DEBUG_TypeCast(BASIC, "float"); }
 295     | tDOUBLE                   { $$ = DEBUG_TypeCast(BASIC, "double"); }
 296     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(BASIC, "long double"); }
 297     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(STRUCT, $2); }
 298     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(STRUCT, $2); }
 299     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(ENUM, $2); }
 300
 301 expr_addr:
 302     expr                         { $$ = DEBUG_EvalExpr($1); }
 303
 304 expr_value:
 305       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 306                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 307 /*
 308  * The expr rule builds an expression tree.  When we are done, we call
 309  * EvalExpr to evaluate the value of the expression.  The advantage of
 310  * the two-step approach is that it is possible to save expressions for
 311  * use in 'display' commands, and in conditional watchpoints.
 312  */
 313 expr:
 314       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 315     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 316     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 317     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 318     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 319     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 320     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 321     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 322     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 323                                                                $5); }
 324     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 325     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 326     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 327     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 328     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 329     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 330     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 331     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 332     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 333     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 334     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 335     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 336     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 337     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 338     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 339     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 340     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 341     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 342     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 343     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 344     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 345     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 346     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 347     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 348     | '+' expr %prec OP_SIGN     { $$ = $2; }
 349     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 350     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 351     | '(' expr ')'               { $$ = $2; }
 352     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 353     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 354     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 355
 356 /*
 357  * The lvalue rule builds an expression tree.  This is a limited form
 358  * of expression that is suitable to be used as an lvalue.
 359  */
 360 lval_addr:
 361     lval                         { $$ = DEBUG_EvalExpr($1); }
 362
 363 lval:
 364       lvalue                     { $$ = $1; }
 365     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 366
 367 lvalue:
 368       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 369     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 370     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 371     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 372     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 373     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 374
 375 %%
 376
 377 void
 378 issue_prompt(){
 379 #ifdef DONT_USE_READLINE
 380         fprintf(stderr,"Wine-dbg>");
 381 #endif
 382 }
 383
 384 void mode_command(int newmode)
 385 {
 386     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 387     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 388 }
 389
 390
 391 /***********************************************************************
 392  *           DEBUG_Main
 393  *
 394  * Debugger main loop.
 395  */
 396 static void DEBUG_Main( int signal )
 397 {
 398     static int loaded_symbols = 0;
 399     static BOOL32 in_debugger = FALSE;
 400     char SymbolTableFile[256];
 401     int newmode;
 402     BOOL32 ret_ok;
 403 #ifdef YYDEBUG
 404     yydebug = 0;
 405 #endif
 406
 407     if (in_debugger)
 408     {
 409         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 410         exit(1);
 411     }
 412     in_debugger = TRUE;
 413     yyin = stdin;
 414
 415     DEBUG_SetBreakpoints( FALSE );
 416
 417     if (!loaded_symbols)
 418     {
 419         loaded_symbols++;
 420
 421         /*
 422          * Initialize the type handling stuff.
 423          */
 424         DEBUG_InitTypes();
 425
 426         /*
 427          * In some cases we can read the stabs information directly
 428          * from the executable.  If this is the case, we don't need
 429          * to bother with trying to read a symbol file, as the stabs
 430          * also have line number and local variable information.
 431          * As long as gcc is used for the compiler, stabs will
 432          * be the default.  On SVr4, DWARF could be used, but we
 433          * don't grok that yet, and in this case we fall back to using
 434          * the wine.sym file.
 435          */
 436         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 437         {
 438             PROFILE_GetWineIniString( "wine", "SymbolTableFile", "wine.sym",
 439                                      SymbolTableFile, sizeof(SymbolTableFile));
 440             DEBUG_ReadSymbolTable( SymbolTableFile );
 441         }
 442
 443         /*
 444          * Read COFF, MSC, etc debug information that we noted when we
 445          * started up the executable.
 446          */
 447         DEBUG_ProcessDeferredDebug();
 448
 449         DEBUG_LoadEntryPoints();
 450     }
 451
 452 #if 0
 453     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 454             EIP_reg(&DEBUG_context),
 455             dbg_exec_mode, dbg_exec_count);
 456
 457     sleep(1);
 458 #endif
 459
 460     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 461                                                       &dbg_exec_count ))
 462     {
 463         DBG_ADDR addr;
 464
 465         addr.seg = CS_reg(&DEBUG_context);
 466         addr.off = EIP_reg(&DEBUG_context);
 467         addr.type = NULL;
 468         DBG_FIX_ADDR_SEG( &addr, 0 );
 469
 470         /* Put the display in a correct state */
 471
 472         XUngrabPointer( display, CurrentTime );
 473         XUngrabServer( display );
 474         XFlush( display );
 475
 476         if (!addr.seg) newmode = 32;
 477         else newmode = (GET_SEL_FLAGS(addr.seg) & LDT_FLAGS_32BIT) ? 32 : 16;
 478
 479         if (newmode != dbg_mode)
 480             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 481
 482         DEBUG_DoDisplay();
 483
 484         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 485         {
 486             DEBUG_InfoRegisters();
 487             DEBUG_InfoStack();
 488             if (dbg_mode == 16)
 489             {
 490                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 491                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 492                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 493             }
 494             DEBUG_BackTrace();
 495         }
 496         else
 497         {
 498           /*
 499            * Do a quiet backtrace so that we have an idea of what the situation
 500            * is WRT the source files.
 501            */
 502             DEBUG_SilentBackTrace();
 503         }
 504
 505         if( signal != SIGTRAP )
 506           {
 507             /* Show where we crashed */
 508             curr_frame = 0;
 509             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 510             fprintf(stderr,":  ");
 511             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 512               {
 513                 DEBUG_Disasm( &addr, TRUE );
 514                 fprintf(stderr,"\n");
 515               }
 516           }
 517
 518         ret_ok = 0;
 519         do
 520         {
 521             issue_prompt();
 522             yyparse();
 523             flush_symbols();
 524             addr.seg = CS_reg(&DEBUG_context);
 525             addr.off = EIP_reg(&DEBUG_context);
 526             DBG_FIX_ADDR_SEG( &addr, 0 );
 527             ret_ok = DEBUG_ValidateRegisters();
 528             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 529         } while (!ret_ok);
 530     }
 531
 532     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 533     /*
 534      * This will have gotten absorbed into the breakpoint info
 535      * if it was used.  Otherwise it would have been ignored.
 536      * In any case, we don't mess with it any more.
 537      */
 538     if( dbg_exec_mode == EXEC_CONT )
 539       {
 540         dbg_exec_count = 0;
 541       }
 542
 543     in_debugger = FALSE;
 544 }
 545
 546
 547 /***********************************************************************
 548  *           DebugBreak16   (KERNEL.203)
 549  */
 550 void DebugBreak16( CONTEXT *regs )
 551 {
 552     const char *module = MODULE_GetModuleName( GetExePtr(GetCurrentTask()) );
 553     fprintf( stderr, "%s called DebugBreak\n", module ? module : "???" );
 554     DEBUG_context = *regs;
 555     DEBUG_Main( SIGTRAP );
 556 }
 557
 558
 559 void wine_debug( int signal, SIGCONTEXT *regs )
 560 {
 561     DEBUG_SetSigContext( regs );
 562 #if 0
 563     DWORD *stack = (DWORD *)ESP_reg(&DEBUG_context);
 564     *(--stack) = 0;
 565     *(--stack) = 0;
 566     *(--stack) = EH_NONCONTINUABLE;
 567     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 568     *(--stack) = EIP_reg(&DEBUG_context);
 569     ESP_reg(&DEBUG_context) = (DWORD)stack;
 570     EIP_reg(&DEBUG_context) = GetProcAddress32( GetModuleHandle("KERNEL32"),
 571                                                 "RaiseException" );
 572 #endif
 573     DEBUG_Main( signal );
 574     DEBUG_GetSigContext( regs );
 575 }
 576
 577 int yyerror(char * s)
 578 {
 579         fprintf(stderr,"%s\n", s);
 580         return 0;
 581 }
 582