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 "class.h"
  23 #include "module.h"
  24 #include "task.h"
  25 #include "options.h"
  26 #include "queue.h"
  27 #include "wine/winbase16.h"
  28 #include "winnt.h"
  29 #include "x11drv.h"
  30 #include "win.h"
  31 #include "debugger.h"
  32 #include "neexe.h"
  33 #include "process.h"
  34 #include "server.h"
  35 #include "main.h"
  36 #include "expr.h"
  37 #include "user.h"
  38
  39 extern FILE * yyin;
  40 unsigned int dbg_mode = 0;
  41 HANDLE dbg_heap = 0;
  42 int curr_frame = 0;
  43
  44 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  45 static int dbg_exec_count = 0;
  46
  47 void issue_prompt(void);
  48 void mode_command(int);
  49 void flush_symbols(void);
  50 int yylex(void);
  51 int yyerror(char *);
  52
  53 #ifdef DBG_need_heap
  54 #define malloc(x) DBG_alloc(x)
  55 #define realloc(x,y) DBG_realloc(x,y)
  56 #define free(x) DBG_free(x)
  57 #endif
  58
  59 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  60
  61 %}
  62
  63 %union
  64 {
  65     DBG_ADDR         address;
  66     enum debug_regs  reg;
  67     char *           string;
  68     int              integer;
  69     struct list_id   listing;
  70     struct expr *    expression;
  71     struct datatype * type;
  72 }
  73
  74 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  75 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT tDEBUGMSG
  76 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  77 %token tPROCESS tMODREF
  78 %token tEOL tSTRING tDEBUGSTR
  79 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  80 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  81 %token <string> tPATH
  82 %token <string> tIDENTIFIER tSTRING tDEBUGSTR
  83 %token <integer> tNUM tFORMAT
  84 %token <reg> tREG
  85 %token tSYMBOLFILE
  86
  87 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  88 %token tSTRUCT tUNION tENUM
  89
  90 /* %left ',' */
  91 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  92          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  93          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  94 /* %left OP_COND */ /* ... ? ... : ... */
  95 %left OP_LOR
  96 %left OP_LAND
  97 %left '|'
  98 %left '^'
  99 %left '&'
 100 %left OP_EQ OP_NE
 101 %left '<' '>' OP_LE OP_GE
 102 %left OP_SHL OP_SHR
 103 %left '+' '-'
 104 %left '*' '/' '%'
 105 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
 106 %left '.' '[' OP_DRF
 107 %nonassoc ':'
 108
 109 %type <expression> expr lval lvalue
 110 %type <type> type_cast type_expr
 111 %type <address> expr_addr lval_addr
 112 %type <integer> expr_value
 113 %type <string> pathname
 114
 115 %type <listing> list_arg
 116
 117 %%
 118
 119 input: line                    { issue_prompt(); }
 120     | input line               { issue_prompt(); }
 121
 122 line: command
 123     | tEOL
 124     | error tEOL               { yyerrok; }
 125
 126 command:
 127       tQUIT tEOL               { exit(0); }
 128     | tHELP tEOL               { DEBUG_Help(); }
 129     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 130     | tCONT tEOL               { dbg_exec_count = 1;
 131                                  dbg_exec_mode = EXEC_CONT; return 0; }
 132     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 133                                  dbg_exec_mode = EXEC_CONT; return 0; }
 134     | tSTEP tEOL               { dbg_exec_count = 1;
 135                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 136     | tNEXT tEOL               { dbg_exec_count = 1;
 137                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 138     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 139                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 140     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 141                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 142     | tSTEPI tEOL              { dbg_exec_count = 1;
 143                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 144     | tNEXTI tEOL              { dbg_exec_count = 1;
 145                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 146     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 147                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 148     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 149                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 150     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 151     | tMODE tNUM tEOL          { mode_command($2); }
 152     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 153     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 154     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 155     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 156     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 157     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 158     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 159     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 160     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 161     | tFINISH tEOL             { dbg_exec_count = 0;
 162                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 163     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 164     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 165     | tDIR tEOL                { DEBUG_NukePath(); }
 166     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 167     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 168     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 169     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 170     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 171     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 172     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 173     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 174     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 175     | tDEBUGMSG tDEBUGSTR tEOL { MAIN_ParseDebugOptions($2); }
 176     | tSYMBOLFILE pathname tEOL{ DEBUG_ReadSymbolTable($2); }
 177     | list_command
 178     | disassemble_command
 179     | set_command
 180     | x_command
 181     | print_command
 182     | break_command
 183     | info_command
 184     | walk_command
 185
 186 set_command:
 187       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 188                                              DEBUG_FreeExprMem(); }
 189     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 190                                              DEBUG_FreeExprMem(); }
 191
 192 pathname:
 193       tIDENTIFIER                    { $$ = $1; }
 194     | tPATH                          { $$ = $1; }
 195
 196 disassemble_command:
 197       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 198     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 199     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 200
 201 list_command:
 202       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 203     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 204     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 205     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 206     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 207
 208 list_arg:
 209       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 210     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 211     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 212     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 213     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 214                                                         0, & $$ );
 215                                              DEBUG_FreeExprMem(); }
 216
 217 x_command:
 218       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 219                                              DEBUG_FreeExprMem(); }
 220     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 221                                              DEBUG_FreeExprMem(); }
 222
 223 print_command:
 224       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 225                                              DEBUG_FreeExprMem(); }
 226     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 227                                              DEBUG_FreeExprMem(); }
 228
 229 break_command:
 230       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 231                                              DEBUG_FreeExprMem(); }
 232     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 233                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 234                                    {
 235                                      DEBUG_AddBreakpoint( &addr );
 236                                    }
 237                                  else
 238                                    {
 239                                      fprintf(stderr,"Unable to add breakpoint\n");
 240                                    }
 241                                 }
 242     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 243                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 244                                    {
 245                                      DEBUG_AddBreakpoint( &addr );
 246                                    }
 247                                  else
 248                                    {
 249                                      fprintf(stderr,"Unable to add breakpoint\n");
 250                                    }
 251                                 }
 252     | tBREAK tNUM tEOL         { struct name_hash *nh;
 253                                  DBG_ADDR addr;
 254                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 255
 256                                  addr.type = NULL;
 257                                  addr.seg = CS_reg(&DEBUG_context);
 258                                  addr.off = EIP_reg(&DEBUG_context);
 259
 260                                  if (ISV86(&DEBUG_context))
 261                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 262                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 263                                  GlobalUnlock16( GetCurrentTask() );
 264                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 265                                                          &nh, 0, NULL);
 266                                  if( nh != NULL )
 267                                    {
 268                                      DEBUG_GetLineNumberAddr(nh,
 269                                                       $2, &addr, TRUE);
 270                                      DEBUG_AddBreakpoint( &addr );
 271                                    }
 272                                  else
 273                                    {
 274                                      fprintf(stderr,"Unable to add breakpoint\n");
 275                                    }
 276                                }
 277
 278     | tBREAK tEOL              { DBG_ADDR addr;
 279                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 280
 281                                  addr.type = NULL;
 282                                  addr.seg = CS_reg(&DEBUG_context);
 283                                  addr.off = EIP_reg(&DEBUG_context);
 284
 285                                  if (ISV86(&DEBUG_context))
 286                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 287                                  GlobalUnlock16( GetCurrentTask() );
 288                                  DEBUG_AddBreakpoint( &addr );
 289                                }
 290
 291 info_command:
 292       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 293     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (CLASS *)$3 );
 294                                              DEBUG_FreeExprMem(); }
 295     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 296     | tINFO tMODULE expr_value tEOL   { NE_DumpModule( $3 );
 297                                              DEBUG_FreeExprMem(); }
 298     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 299                                              DEBUG_FreeExprMem(); }
 300     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 301     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 302                                              DEBUG_FreeExprMem(); }
 303     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 304     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 305     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 306     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 307                                              DEBUG_FreeExprMem(); }
 308     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 309     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 310
 311 walk_command:
 312       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 313     | tWALK tMODULE tEOL        { NE_WalkModules(); }
 314     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 315     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 316     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 317     | tWALK tPROCESS tEOL       { PROCESS_WalkProcess(); }
 318     | tWALK tMODREF expr_value tEOL   { MODULE_WalkModref( $3 ); }
 319
 320
 321 type_cast:
 322       '(' type_expr ')'         { $$ = $2; }
 323
 324 type_expr:
 325       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 326     |  tINT                     { $$ = DEBUG_TypeCast(DT_BASIC, "int"); }
 327     | tCHAR                     { $$ = DEBUG_TypeCast(DT_BASIC, "char"); }
 328     | tLONG tINT                { $$ = DEBUG_TypeCast(DT_BASIC, "long int"); }
 329     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned int"); }
 330     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(DT_BASIC, "long unsigned int"); }
 331     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(DT_BASIC, "long long int"); }
 332     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(DT_BASIC, "long long unsigned int"); }
 333     | tSHORT tINT               { $$ = DEBUG_TypeCast(DT_BASIC, "short int"); }
 334     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(DT_BASIC, "short unsigned int"); }
 335     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(DT_BASIC, "signed char"); }
 336     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned char"); }
 337     | tFLOAT                    { $$ = DEBUG_TypeCast(DT_BASIC, "float"); }
 338     | tDOUBLE                   { $$ = DEBUG_TypeCast(DT_BASIC, "double"); }
 339     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(DT_BASIC, "long double"); }
 340     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 341     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 342     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(DT_ENUM, $2); }
 343
 344 expr_addr:
 345     expr                         { $$ = DEBUG_EvalExpr($1); }
 346
 347 expr_value:
 348       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 349                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 350 /*
 351  * The expr rule builds an expression tree.  When we are done, we call
 352  * EvalExpr to evaluate the value of the expression.  The advantage of
 353  * the two-step approach is that it is possible to save expressions for
 354  * use in 'display' commands, and in conditional watchpoints.
 355  */
 356 expr:
 357       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 358     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 359     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 360     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 361     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 362     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 363     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 364     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 365     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 366                                                                $5); }
 367     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 368     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 369     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 370     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 371     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 372     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 373     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 374     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 375     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 376     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 377     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 378     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 379     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 380     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 381     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 382     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 383     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 384     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 385     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 386     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 387     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 388     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 389     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 390     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 391     | '+' expr %prec OP_SIGN     { $$ = $2; }
 392     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 393     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 394     | '(' expr ')'               { $$ = $2; }
 395     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 396     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 397     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 398
 399 /*
 400  * The lvalue rule builds an expression tree.  This is a limited form
 401  * of expression that is suitable to be used as an lvalue.
 402  */
 403 lval_addr:
 404     lval                         { $$ = DEBUG_EvalExpr($1); }
 405
 406 lval:
 407       lvalue                     { $$ = $1; }
 408     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 409
 410 lvalue:
 411       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 412     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 413     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 414     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 415     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 416     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 417
 418 %%
 419
 420 void
 421 issue_prompt(){
 422 #ifdef DONT_USE_READLINE
 423         fprintf(stderr,"Wine-dbg>");
 424 #endif
 425 }
 426
 427 void mode_command(int newmode)
 428 {
 429     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 430     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 431 }
 432
 433
 434 /***********************************************************************
 435  *           DEBUG_Main
 436  *
 437  * Debugger main loop.
 438  */
 439 static void DEBUG_Main( int signal )
 440 {
 441     static int loaded_symbols = 0;
 442     static BOOL frozen = FALSE;
 443     static BOOL in_debugger = FALSE;
 444     char SymbolTableFile[256];
 445     int newmode;
 446     BOOL ret_ok;
 447 #ifdef YYDEBUG
 448     yydebug = 0;
 449 #endif
 450
 451     if (in_debugger)
 452     {
 453         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 454         exit(1);
 455     }
 456     in_debugger = TRUE;
 457     yyin = stdin;
 458
 459     DEBUG_SetBreakpoints( FALSE );
 460
 461     if (!loaded_symbols)
 462     {
 463         loaded_symbols++;
 464
 465         if ( !frozen )
 466         {
 467             /* Don't freeze thread currently holding the X crst! */
 468             EnterCriticalSection( &X11DRV_CritSection );
 469             CLIENT_DebuggerRequest( DEBUGGER_FREEZE_ALL );
 470             LeaveCriticalSection( &X11DRV_CritSection );
 471             frozen = TRUE;
 472         }
 473
 474 #ifdef DBG_need_heap
 475         /*
 476          * Initialize the debugger heap.
 477          */
 478         dbg_heap = HeapCreate(HEAP_NO_SERIALIZE, 0x1000, 0x8000000); /* 128MB */
 479 #endif
 480
 481         /*
 482          * Initialize the type handling stuff.
 483          */
 484         DEBUG_InitTypes();
 485
 486         /*
 487          * In some cases we can read the stabs information directly
 488          * from the executable.  If this is the case, we don't need
 489          * to bother with trying to read a symbol file, as the stabs
 490          * also have line number and local variable information.
 491          * As long as gcc is used for the compiler, stabs will
 492          * be the default.  On SVr4, DWARF could be used, but we
 493          * don't grok that yet, and in this case we fall back to using
 494          * the wine.sym file.
 495          */
 496         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 497         {
 498             char *symfilename = "wine.sym";
 499             struct stat statbuf;
 500             if (-1 == stat(symfilename, &statbuf) )
 501                 symfilename = LIBDIR "wine.sym";
 502
 503             PROFILE_GetWineIniString( "wine", "SymbolTableFile", symfilename,
 504                                      SymbolTableFile, sizeof(SymbolTableFile));
 505             DEBUG_ReadSymbolTable( SymbolTableFile );
 506         }
 507
 508         DEBUG_LoadEntryPoints();
 509         DEBUG_ProcessDeferredDebug();
 510     }
 511
 512 #if 0
 513     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 514             EIP_reg(&DEBUG_context),
 515             dbg_exec_mode, dbg_exec_count);
 516
 517     sleep(1);
 518 #endif
 519
 520     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 521                                                       &dbg_exec_count ))
 522     {
 523         DBG_ADDR addr;
 524         TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 525
 526         addr.seg = CS_reg(&DEBUG_context);
 527         addr.off = EIP_reg(&DEBUG_context);
 528         if (ISV86(&DEBUG_context)) addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 529         addr.type = NULL;
 530         DBG_FIX_ADDR_SEG( &addr, 0 );
 531
 532         GlobalUnlock16( GetCurrentTask() );
 533
 534         if ( !frozen )
 535         {
 536             /* Don't freeze thread currently holding the X crst! */
 537             EnterCriticalSection( &X11DRV_CritSection );
 538             CLIENT_DebuggerRequest( DEBUGGER_FREEZE_ALL );
 539             LeaveCriticalSection( &X11DRV_CritSection );
 540             frozen = TRUE;
 541         }
 542
 543         /* Put the display in a correct state */
 544         USER_Driver->pBeginDebugging();
 545
 546         newmode = ISV86(&DEBUG_context) ? 16 : IS_SELECTOR_32BIT(addr.seg) ? 32 : 16;
 547         if (newmode != dbg_mode)
 548             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 549
 550         DEBUG_DoDisplay();
 551
 552         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 553         {
 554             DEBUG_InfoRegisters();
 555             DEBUG_InfoStack();
 556             if (dbg_mode == 16)
 557             {
 558                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 559                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 560                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 561             }
 562             DEBUG_BackTrace();
 563         }
 564         else
 565         {
 566           /*
 567            * Do a quiet backtrace so that we have an idea of what the situation
 568            * is WRT the source files.
 569            */
 570             DEBUG_SilentBackTrace();
 571         }
 572
 573         if ((signal != SIGTRAP) ||
 574             (dbg_exec_mode == EXEC_STEPI_OVER) ||
 575             (dbg_exec_mode == EXEC_STEPI_INSTR))
 576         {
 577             /* Show where we crashed */
 578             curr_frame = 0;
 579             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 580             fprintf(stderr,":  ");
 581             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 582               {
 583                 DEBUG_Disasm( &addr, TRUE );
 584                 fprintf(stderr,"\n");
 585               }
 586         }
 587
 588         ret_ok = 0;
 589         do
 590         {
 591             issue_prompt();
 592             yyparse();
 593             flush_symbols();
 594             addr.seg = CS_reg(&DEBUG_context) | (addr.seg&0xffff0000);
 595             addr.off = EIP_reg(&DEBUG_context);
 596             DBG_FIX_ADDR_SEG( &addr, 0 );
 597             ret_ok = DEBUG_ValidateRegisters();
 598             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 599         } while (!ret_ok);
 600     }
 601
 602     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 603     /*
 604      * This will have gotten absorbed into the breakpoint info
 605      * if it was used.  Otherwise it would have been ignored.
 606      * In any case, we don't mess with it any more.
 607      */
 608     if( dbg_exec_mode == EXEC_CONT )
 609       {
 610         dbg_exec_count = 0;
 611
 612         if ( frozen )
 613         {
 614             CLIENT_DebuggerRequest( DEBUGGER_UNFREEZE_ALL );
 615             frozen = FALSE;
 616         }
 617       }
 618
 619     in_debugger = FALSE;
 620
 621     USER_Driver->pEndDebugging();
 622 }
 623
 624
 625
 626 /***********************************************************************
 627  *           DebugBreak   (KERNEL.203) (KERNEL32.181)
 628  */
 629 void DebugBreak16( CONTEXT *regs )
 630 {
 631     char module[10];
 632     if (!GetModuleName16( GetCurrentTask(), module, sizeof(module) ))
 633         strcpy( module, "???" );
 634     fprintf( stderr, "%s called DebugBreak\n", module );
 635     DEBUG_context = *regs;
 636     DEBUG_Main( SIGTRAP );
 637 }
 638
 639
 640 void ctx_debug( int signal, CONTEXT *regs )
 641 {
 642     DEBUG_context = *regs;
 643     DEBUG_Main( signal );
 644     *regs = DEBUG_context;
 645 }
 646
 647 void wine_debug( int signal, SIGCONTEXT *regs )
 648 {
 649 #if 0
 650     DWORD *stack = (DWORD *)ESP_sig(regs);
 651     *(--stack) = 0;
 652     *(--stack) = 0;
 653     *(--stack) = EH_NONCONTINUABLE;
 654     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 655     *(--stack) = EIP_sig(regs);
 656     ESP_sig(regs) = (DWORD)stack;
 657     EIP_sig(regs) = (DWORD)RaiseException;
 658 #else
 659     DEBUG_SetSigContext( regs );
 660     DEBUG_Main( signal );
 661     DEBUG_GetSigContext( regs );
 662 #endif
 663 }
 664
 665 int yyerror(char * s)
 666 {
 667         fprintf(stderr,"%s\n", s);
 668         return 0;
 669 }