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 "config.h"
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <signal.h>
  15 #include <sys/stat.h>
  16 #include <unistd.h>
  17 #ifdef HAVE_ALLOCA_H
  18 #include <alloca.h>
  19 #endif
  20
  21 #include "winbase.h"
  22 #include "module.h"
  23 #include "task.h"
  24 #include "options.h"
  25 #include "queue.h"
  26 #include "wine/winbase16.h"
  27 #include "winnt.h"
  28 #include "x11drv.h"
  29 #include "win.h"
  30 #include "debugger.h"
  31 #include "neexe.h"
  32 #include "process.h"
  33 #include "server.h"
  34 #include "main.h"
  35 #include "expr.h"
  36 #include "user.h"
  37
  38 extern FILE * yyin;
  39 unsigned int dbg_mode = 0;
  40 HANDLE dbg_heap = 0;
  41 int curr_frame = 0;
  42
  43 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  44 static int dbg_exec_count = 0;
  45
  46 void issue_prompt(void);
  47 void mode_command(int);
  48 void flush_symbols(void);
  49 int yylex(void);
  50 int yyerror(char *);
  51
  52 #ifdef DBG_need_heap
  53 #define malloc(x) DBG_alloc(x)
  54 #define realloc(x,y) DBG_realloc(x,y)
  55 #define free(x) DBG_free(x)
  56 #endif
  57
  58 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  59
  60 %}
  61
  62 %union
  63 {
  64     DBG_ADDR         address;
  65     enum debug_regs  reg;
  66     char *           string;
  67     int              integer;
  68     struct list_id   listing;
  69     struct expr *    expression;
  70     struct datatype * type;
  71 }
  72
  73 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  74 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT tDEBUGMSG
  75 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  76 %token tPROCESS tMODREF
  77 %token tEOL tSTRING tDEBUGSTR
  78 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  79 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  80 %token <string> tPATH
  81 %token <string> tIDENTIFIER tSTRING tDEBUGSTR
  82 %token <integer> tNUM tFORMAT
  83 %token <reg> tREG
  84 %token tSYMBOLFILE
  85
  86 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  87 %token tSTRUCT tUNION tENUM
  88
  89 /* %left ',' */
  90 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  91          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  92          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  93 /* %left OP_COND */ /* ... ? ... : ... */
  94 %left OP_LOR
  95 %left OP_LAND
  96 %left '|'
  97 %left '^'
  98 %left '&'
  99 %left OP_EQ OP_NE
 100 %left '<' '>' OP_LE OP_GE
 101 %left OP_SHL OP_SHR
 102 %left '+' '-'
 103 %left '*' '/' '%'
 104 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
 105 %left '.' '[' OP_DRF
 106 %nonassoc ':'
 107
 108 %type <expression> expr lval lvalue
 109 %type <type> type_cast type_expr
 110 %type <address> expr_addr lval_addr
 111 %type <integer> expr_value
 112 %type <string> pathname
 113
 114 %type <listing> list_arg
 115
 116 %%
 117
 118 input: line                    { issue_prompt(); }
 119     | input line               { issue_prompt(); }
 120
 121 line: command
 122     | tEOL
 123     | error tEOL               { yyerrok; }
 124
 125 command:
 126       tQUIT tEOL               { exit(0); }
 127     | tHELP tEOL               { DEBUG_Help(); }
 128     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 129     | tCONT tEOL               { dbg_exec_count = 1;
 130                                  dbg_exec_mode = EXEC_CONT; return 0; }
 131     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 132                                  dbg_exec_mode = EXEC_CONT; return 0; }
 133     | tSTEP tEOL               { dbg_exec_count = 1;
 134                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 135     | tNEXT tEOL               { dbg_exec_count = 1;
 136                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 137     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 138                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 139     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 140                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 141     | tSTEPI tEOL              { dbg_exec_count = 1;
 142                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 143     | tNEXTI tEOL              { dbg_exec_count = 1;
 144                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 145     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 146                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 147     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 148                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 149     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 150     | tMODE tNUM tEOL          { mode_command($2); }
 151     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 152     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 153     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 154     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 155     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 156     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 157     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 158     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 159     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 160     | tFINISH tEOL             { dbg_exec_count = 0;
 161                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 162     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 163     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 164     | tDIR tEOL                { DEBUG_NukePath(); }
 165     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 166     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 167     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 168     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 169     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 170     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 171     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 172     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 173     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 174     | tDEBUGMSG tDEBUGSTR tEOL { MAIN_ParseDebugOptions($2); }
 175     | tSYMBOLFILE pathname tEOL{ DEBUG_ReadSymbolTable($2); }
 176     | list_command
 177     | disassemble_command
 178     | set_command
 179     | x_command
 180     | print_command
 181     | break_command
 182     | info_command
 183     | walk_command
 184
 185 set_command:
 186       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 187                                              DEBUG_FreeExprMem(); }
 188     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 189                                              DEBUG_FreeExprMem(); }
 190
 191 pathname:
 192       tIDENTIFIER                    { $$ = $1; }
 193     | tPATH                          { $$ = $1; }
 194
 195 disassemble_command:
 196       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 197     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 198     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 199
 200 list_command:
 201       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 202     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 203     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 204     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 205     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 206
 207 list_arg:
 208       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 209     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 210     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 211     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 212     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 213                                                         0, & $$ );
 214                                              DEBUG_FreeExprMem(); }
 215
 216 x_command:
 217       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 218                                              DEBUG_FreeExprMem(); }
 219     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 220                                              DEBUG_FreeExprMem(); }
 221
 222 print_command:
 223       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 224                                              DEBUG_FreeExprMem(); }
 225     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 226                                              DEBUG_FreeExprMem(); }
 227
 228 break_command:
 229       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 230                                              DEBUG_FreeExprMem(); }
 231     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 232                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 233                                    {
 234                                      DEBUG_AddBreakpoint( &addr );
 235                                    }
 236                                  else
 237                                    {
 238                                      fprintf(stderr,"Unable to add breakpoint\n");
 239                                    }
 240                                 }
 241     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 242                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 243                                    {
 244                                      DEBUG_AddBreakpoint( &addr );
 245                                    }
 246                                  else
 247                                    {
 248                                      fprintf(stderr,"Unable to add breakpoint\n");
 249                                    }
 250                                 }
 251     | tBREAK tNUM tEOL         { struct name_hash *nh;
 252                                  DBG_ADDR addr;
 253                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 254
 255                                  addr.type = NULL;
 256                                  addr.seg = CS_reg(&DEBUG_context);
 257                                  addr.off = EIP_reg(&DEBUG_context);
 258
 259                                  if (ISV86(&DEBUG_context))
 260                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 261                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 262                                  GlobalUnlock16( GetCurrentTask() );
 263                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 264                                                          &nh, 0, NULL);
 265                                  if( nh != NULL )
 266                                    {
 267                                      DEBUG_GetLineNumberAddr(nh,
 268                                                       $2, &addr, TRUE);
 269                                      DEBUG_AddBreakpoint( &addr );
 270                                    }
 271                                  else
 272                                    {
 273                                      fprintf(stderr,"Unable to add breakpoint\n");
 274                                    }
 275                                }
 276
 277     | tBREAK tEOL              { DBG_ADDR addr;
 278                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 279
 280                                  addr.type = NULL;
 281                                  addr.seg = CS_reg(&DEBUG_context);
 282                                  addr.off = EIP_reg(&DEBUG_context);
 283
 284                                  if (ISV86(&DEBUG_context))
 285                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 286                                  GlobalUnlock16( GetCurrentTask() );
 287                                  DEBUG_AddBreakpoint( &addr );
 288                                }
 289
 290 info_command:
 291       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 292     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (struct tagCLASS *)$3 );
 293                                              DEBUG_FreeExprMem(); }
 294     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 295     | tINFO tMODULE expr_value tEOL   { NE_DumpModule( $3 );
 296                                              DEBUG_FreeExprMem(); }
 297     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 298                                              DEBUG_FreeExprMem(); }
 299     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 300     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 301                                              DEBUG_FreeExprMem(); }
 302     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 303     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 304     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 305     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 306                                              DEBUG_FreeExprMem(); }
 307     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 308     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 309
 310 walk_command:
 311       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 312     | tWALK tMODULE tEOL        { NE_WalkModules(); }
 313     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 314     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 315     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 316     | tWALK tPROCESS tEOL       { PROCESS_WalkProcess(); }
 317     | tWALK tMODREF expr_value tEOL   { MODULE_WalkModref( $3 ); }
 318
 319
 320 type_cast:
 321       '(' type_expr ')'         { $$ = $2; }
 322
 323 type_expr:
 324       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 325     |  tINT                     { $$ = DEBUG_TypeCast(DT_BASIC, "int"); }
 326     | tCHAR                     { $$ = DEBUG_TypeCast(DT_BASIC, "char"); }
 327     | tLONG tINT                { $$ = DEBUG_TypeCast(DT_BASIC, "long int"); }
 328     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned int"); }
 329     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(DT_BASIC, "long unsigned int"); }
 330     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(DT_BASIC, "long long int"); }
 331     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(DT_BASIC, "long long unsigned int"); }
 332     | tSHORT tINT               { $$ = DEBUG_TypeCast(DT_BASIC, "short int"); }
 333     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(DT_BASIC, "short unsigned int"); }
 334     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(DT_BASIC, "signed char"); }
 335     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned char"); }
 336     | tFLOAT                    { $$ = DEBUG_TypeCast(DT_BASIC, "float"); }
 337     | tDOUBLE                   { $$ = DEBUG_TypeCast(DT_BASIC, "double"); }
 338     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(DT_BASIC, "long double"); }
 339     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 340     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 341     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(DT_ENUM, $2); }
 342
 343 expr_addr:
 344     expr                         { $$ = DEBUG_EvalExpr($1); }
 345
 346 expr_value:
 347       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 348                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 349 /*
 350  * The expr rule builds an expression tree.  When we are done, we call
 351  * EvalExpr to evaluate the value of the expression.  The advantage of
 352  * the two-step approach is that it is possible to save expressions for
 353  * use in 'display' commands, and in conditional watchpoints.
 354  */
 355 expr:
 356       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 357     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 358     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 359     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 360     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 361     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 362     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 363     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 364     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 365                                                                $5); }
 366     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 367     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 368     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 369     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 370     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 371     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 372     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 373     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 374     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 375     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 376     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 377     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 378     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 379     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 380     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 381     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 382     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 383     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 384     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 385     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 386     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 387     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 388     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 389     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 390     | '+' expr %prec OP_SIGN     { $$ = $2; }
 391     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 392     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 393     | '(' expr ')'               { $$ = $2; }
 394     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 395     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 396     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 397
 398 /*
 399  * The lvalue rule builds an expression tree.  This is a limited form
 400  * of expression that is suitable to be used as an lvalue.
 401  */
 402 lval_addr:
 403     lval                         { $$ = DEBUG_EvalExpr($1); }
 404
 405 lval:
 406       lvalue                     { $$ = $1; }
 407     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 408
 409 lvalue:
 410       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 411     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 412     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 413     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 414     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 415     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 416
 417 %%
 418
 419 void
 420 issue_prompt(){
 421 #ifdef DONT_USE_READLINE
 422         fprintf(stderr,"Wine-dbg>");
 423 #endif
 424 }
 425
 426 void mode_command(int newmode)
 427 {
 428     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 429     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 430 }
 431
 432
 433 /***********************************************************************
 434  *           DEBUG_Main
 435  *
 436  * Debugger main loop.
 437  */
 438 static void DEBUG_Main( int signal )
 439 {
 440     static int loaded_symbols = 0;
 441     static BOOL frozen = FALSE;
 442     static BOOL in_debugger = FALSE;
 443     char SymbolTableFile[256];
 444     int newmode;
 445     BOOL ret_ok;
 446 #ifdef YYDEBUG
 447     yydebug = 0;
 448 #endif
 449
 450     if (in_debugger)
 451     {
 452         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 453         exit(1);
 454     }
 455     in_debugger = TRUE;
 456     yyin = stdin;
 457
 458     DEBUG_SetBreakpoints( FALSE );
 459
 460     if (!loaded_symbols)
 461     {
 462         loaded_symbols++;
 463
 464         if ( !frozen )
 465         {
 466             /* Don't freeze thread currently holding the X crst! */
 467             EnterCriticalSection( &X11DRV_CritSection );
 468             CLIENT_DebuggerRequest( DEBUGGER_FREEZE_ALL );
 469             LeaveCriticalSection( &X11DRV_CritSection );
 470             frozen = TRUE;
 471         }
 472
 473 #ifdef DBG_need_heap
 474         /*
 475          * Initialize the debugger heap.
 476          */
 477         dbg_heap = HeapCreate(HEAP_NO_SERIALIZE, 0x1000, 0x8000000); /* 128MB */
 478 #endif
 479
 480         /*
 481          * Initialize the type handling stuff.
 482          */
 483         DEBUG_InitTypes();
 484
 485         /*
 486          * In some cases we can read the stabs information directly
 487          * from the executable.  If this is the case, we don't need
 488          * to bother with trying to read a symbol file, as the stabs
 489          * also have line number and local variable information.
 490          * As long as gcc is used for the compiler, stabs will
 491          * be the default.  On SVr4, DWARF could be used, but we
 492          * don't grok that yet, and in this case we fall back to using
 493          * the wine.sym file.
 494          */
 495         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 496         {
 497             char *symfilename = "wine.sym";
 498             struct stat statbuf;
 499             if (-1 == stat(symfilename, &statbuf) )
 500                 symfilename = LIBDIR "wine.sym";
 501
 502             PROFILE_GetWineIniString( "wine", "SymbolTableFile", symfilename,
 503                                      SymbolTableFile, sizeof(SymbolTableFile));
 504             DEBUG_ReadSymbolTable( SymbolTableFile );
 505         }
 506
 507         DEBUG_LoadEntryPoints();
 508         DEBUG_ProcessDeferredDebug();
 509     }
 510
 511 #if 0
 512     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 513             EIP_reg(&DEBUG_context),
 514             dbg_exec_mode, dbg_exec_count);
 515
 516     sleep(1);
 517 #endif
 518
 519     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 520                                                       &dbg_exec_count ))
 521     {
 522         DBG_ADDR addr;
 523         TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 524
 525         addr.seg = CS_reg(&DEBUG_context);
 526         addr.off = EIP_reg(&DEBUG_context);
 527         if (ISV86(&DEBUG_context)) addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 528         addr.type = NULL;
 529         DBG_FIX_ADDR_SEG( &addr, 0 );
 530
 531         GlobalUnlock16( GetCurrentTask() );
 532
 533         if ( !frozen )
 534         {
 535             /* Don't freeze thread currently holding the X crst! */
 536             EnterCriticalSection( &X11DRV_CritSection );
 537             CLIENT_DebuggerRequest( DEBUGGER_FREEZE_ALL );
 538             LeaveCriticalSection( &X11DRV_CritSection );
 539             frozen = TRUE;
 540         }
 541
 542         /* Put the display in a correct state */
 543         USER_Driver->pBeginDebugging();
 544
 545         newmode = ISV86(&DEBUG_context) ? 16 : IS_SELECTOR_32BIT(addr.seg) ? 32 : 16;
 546         if (newmode != dbg_mode)
 547             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 548
 549         DEBUG_DoDisplay();
 550
 551         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 552         {
 553             DEBUG_InfoRegisters();
 554             DEBUG_InfoStack();
 555             if (dbg_mode == 16)
 556             {
 557                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 558                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 559                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 560             }
 561             DEBUG_BackTrace();
 562         }
 563         else
 564         {
 565           /*
 566            * Do a quiet backtrace so that we have an idea of what the situation
 567            * is WRT the source files.
 568            */
 569             DEBUG_SilentBackTrace();
 570         }
 571
 572         if ((signal != SIGTRAP) ||
 573             (dbg_exec_mode == EXEC_STEPI_OVER) ||
 574             (dbg_exec_mode == EXEC_STEPI_INSTR))
 575         {
 576             /* Show where we crashed */
 577             curr_frame = 0;
 578             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 579             fprintf(stderr,":  ");
 580             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 581               {
 582                 DEBUG_Disasm( &addr, TRUE );
 583                 fprintf(stderr,"\n");
 584               }
 585         }
 586
 587         ret_ok = 0;
 588         do
 589         {
 590             issue_prompt();
 591             yyparse();
 592             flush_symbols();
 593             addr.seg = CS_reg(&DEBUG_context) | (addr.seg&0xffff0000);
 594             addr.off = EIP_reg(&DEBUG_context);
 595             DBG_FIX_ADDR_SEG( &addr, 0 );
 596             ret_ok = DEBUG_ValidateRegisters();
 597             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 598         } while (!ret_ok);
 599     }
 600
 601     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 602     /*
 603      * This will have gotten absorbed into the breakpoint info
 604      * if it was used.  Otherwise it would have been ignored.
 605      * In any case, we don't mess with it any more.
 606      */
 607     if( dbg_exec_mode == EXEC_CONT )
 608       {
 609         dbg_exec_count = 0;
 610
 611         if ( frozen )
 612         {
 613             CLIENT_DebuggerRequest( DEBUGGER_UNFREEZE_ALL );
 614             frozen = FALSE;
 615         }
 616       }
 617
 618     in_debugger = FALSE;
 619
 620     USER_Driver->pEndDebugging();
 621 }
 622
 623
 624
 625 /***********************************************************************
 626  *           DebugBreak   (KERNEL.203) (KERNEL32.181)
 627  */
 628 void DebugBreak16( CONTEXT *regs )
 629 {
 630     char module[10];
 631     if (!GetModuleName16( GetCurrentTask(), module, sizeof(module) ))
 632         strcpy( module, "???" );
 633     fprintf( stderr, "%s called DebugBreak\n", module );
 634     DEBUG_context = *regs;
 635     DEBUG_Main( SIGTRAP );
 636 }
 637
 638
 639 void ctx_debug( int signal, CONTEXT *regs )
 640 {
 641     DEBUG_context = *regs;
 642     DEBUG_Main( signal );
 643     *regs = DEBUG_context;
 644 }
 645
 646 void wine_debug( int signal, SIGCONTEXT *regs )
 647 {
 648 #if 0
 649     DWORD *stack = (DWORD *)ESP_sig(regs);
 650     *(--stack) = 0;
 651     *(--stack) = 0;
 652     *(--stack) = EH_NONCONTINUABLE;
 653     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 654     *(--stack) = EIP_sig(regs);
 655     ESP_sig(regs) = (DWORD)stack;
 656     EIP_sig(regs) = (DWORD)RaiseException;
 657 #else
 658     DEBUG_SetSigContext( regs );
 659     DEBUG_Main( signal );
 660     DEBUG_GetSigContext( regs );
 661 #endif
 662 }
 663
 664 int yyerror(char * s)
 665 {
 666         fprintf(stderr,"%s\n", s);
 667         return 0;
 668 }