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 "ts_xlib.h"
  10
  11 #include <stdio.h>
  12 #include <signal.h>
  13 #include <sys/stat.h>
  14 #include <unistd.h>
  15 #include "winbase.h"
  16 #include "class.h"
  17 #include "module.h"
  18 #include "task.h"
  19 #include "options.h"
  20 #include "queue.h"
  21 #include "win.h"
  22 #include "winnt.h"
  23 #include "debugger.h"
  24 #include "neexe.h"
  25 #include "process.h"
  26 #include "main.h"
  27 #include "ts_xlib.h"
  28
  29 #include "expr.h"
  30
  31 extern FILE * yyin;
  32 unsigned int dbg_mode = 0;
  33 int curr_frame = 0;
  34
  35 static enum exec_mode dbg_exec_mode = EXEC_CONT;
  36 static int dbg_exec_count = 0;
  37
  38 void issue_prompt(void);
  39 void mode_command(int);
  40 void flush_symbols(void);
  41 int yylex(void);
  42 int yyerror(char *);
  43
  44 extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
  45
  46 %}
  47
  48 %union
  49 {
  50     DBG_ADDR         address;
  51     enum debug_regs  reg;
  52     char *           string;
  53     int              integer;
  54     struct list_id   listing;
  55     struct expr *    expression;
  56     struct datatype * type;
  57 }
  58
  59 %token tCONT tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
  60 %token tENABLE tDISABLE tBREAK tDELETE tSET tMODE tPRINT tEXAM tABORT tDEBUGMSG
  61 %token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
  62 %token tEOL tSTRING tDEBUGSTR
  63 %token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
  64 %token tSTEPI tNEXTI tFINISH tSHOW tDIR
  65 %token <string> tPATH
  66 %token <string> tIDENTIFIER tSTRING tDEBUGSTR
  67 %token <integer> tNUM tFORMAT
  68 %token <reg> tREG
  69 %token tSYMBOLFILE
  70
  71 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
  72 %token tSTRUCT tUNION tENUM
  73
  74 /* %left ',' */
  75 /* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
  76          OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
  77          OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
  78 /* %left OP_COND */ /* ... ? ... : ... */
  79 %left OP_LOR
  80 %left OP_LAND
  81 %left '|'
  82 %left '^'
  83 %left '&'
  84 %left OP_EQ OP_NE
  85 %left '<' '>' OP_LE OP_GE
  86 %left OP_SHL OP_SHR
  87 %left '+' '-'
  88 %left '*' '/' '%'
  89 %left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
  90 %left '.' '[' OP_DRF
  91 %nonassoc ':'
  92
  93 %type <expression> expr lval lvalue
  94 %type <type> type_cast type_expr
  95 %type <address> expr_addr lval_addr
  96 %type <integer> expr_value
  97 %type <string> pathname
  98
  99 %type <listing> list_arg
 100
 101 %%
 102
 103 input: line                    { issue_prompt(); }
 104     | input line               { issue_prompt(); }
 105
 106 line: command
 107     | tEOL
 108     | error tEOL               { yyerrok; }
 109
 110 command:
 111       tQUIT tEOL               { exit(0); }
 112     | tHELP tEOL               { DEBUG_Help(); }
 113     | tHELP tINFO tEOL         { DEBUG_HelpInfo(); }
 114     | tCONT tEOL               { dbg_exec_count = 1;
 115                                  dbg_exec_mode = EXEC_CONT; return 0; }
 116     | tCONT tNUM tEOL          { dbg_exec_count = $2;
 117                                  dbg_exec_mode = EXEC_CONT; return 0; }
 118     | tSTEP tEOL               { dbg_exec_count = 1;
 119                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 120     | tNEXT tEOL               { dbg_exec_count = 1;
 121                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 122     | tSTEP tNUM tEOL          { dbg_exec_count = $2;
 123                                  dbg_exec_mode = EXEC_STEP_INSTR; return 0; }
 124     | tNEXT tNUM tEOL          { dbg_exec_count = $2;
 125                                  dbg_exec_mode = EXEC_STEP_OVER; return 0; }
 126     | tSTEPI tEOL              { dbg_exec_count = 1;
 127                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 128     | tNEXTI tEOL              { dbg_exec_count = 1;
 129                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 130     | tSTEPI tNUM tEOL         { dbg_exec_count = $2;
 131                                  dbg_exec_mode = EXEC_STEPI_INSTR; return 0; }
 132     | tNEXTI tNUM tEOL         { dbg_exec_count = $2;
 133                                  dbg_exec_mode = EXEC_STEPI_OVER; return 0; }
 134     | tABORT tEOL              { kill(getpid(), SIGABRT); }
 135     | tMODE tNUM tEOL          { mode_command($2); }
 136     | tENABLE tNUM tEOL        { DEBUG_EnableBreakpoint( $2, TRUE ); }
 137     | tDISABLE tNUM tEOL       { DEBUG_EnableBreakpoint( $2, FALSE ); }
 138     | tDELETE tBREAK tNUM tEOL { DEBUG_DelBreakpoint( $3 ); }
 139     | tBACKTRACE tEOL          { DEBUG_BackTrace(); }
 140     | tUP tEOL                 { DEBUG_SetFrame( curr_frame + 1 );  }
 141     | tUP tNUM tEOL            { DEBUG_SetFrame( curr_frame + $2 ); }
 142     | tDOWN tEOL               { DEBUG_SetFrame( curr_frame - 1 );  }
 143     | tDOWN tNUM tEOL          { DEBUG_SetFrame( curr_frame - $2 ); }
 144     | tFRAME tNUM tEOL         { DEBUG_SetFrame( $2 ); }
 145     | tFINISH tEOL             { dbg_exec_count = 0;
 146                                  dbg_exec_mode = EXEC_FINISH; return 0; }
 147     | tSHOW tDIR tEOL          { DEBUG_ShowDir(); }
 148     | tDIR pathname tEOL       { DEBUG_AddPath( $2 ); }
 149     | tDIR tEOL                { DEBUG_NukePath(); }
 150     | tDISPLAY tEOL            { DEBUG_InfoDisplay(); }
 151     | tDISPLAY expr tEOL       { DEBUG_AddDisplay($2, 1, 0); }
 152     | tDISPLAY tFORMAT expr tEOL { DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
 153     | tDELETE tDISPLAY tNUM tEOL { DEBUG_DelDisplay( $3 ); }
 154     | tDELETE tDISPLAY tEOL    { DEBUG_DelDisplay( -1 ); }
 155     | tUNDISPLAY tNUM tEOL     { DEBUG_DelDisplay( $2 ); }
 156     | tUNDISPLAY tEOL          { DEBUG_DelDisplay( -1 ); }
 157     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
 158     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
 159     | tDEBUGMSG tDEBUGSTR tEOL { MAIN_ParseDebugOptions($2); }
 160     | tSYMBOLFILE pathname tEOL{ DEBUG_ReadSymbolTable($2); }
 161     | list_command
 162     | disassemble_command
 163     | set_command
 164     | x_command
 165     | print_command
 166     | break_command
 167     | info_command
 168     | walk_command
 169
 170 set_command:
 171       tSET tREG '=' expr_value tEOL        { DEBUG_SetRegister( $2, $4 );
 172                                              DEBUG_FreeExprMem(); }
 173     | tSET lval_addr '=' expr_value tEOL   { DEBUG_WriteMemory( &$2, $4 );
 174                                              DEBUG_FreeExprMem(); }
 175
 176 pathname:
 177       tIDENTIFIER                    { $$ = $1; }
 178     | tPATH                          { $$ = $1; }
 179
 180 disassemble_command:
 181       tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
 182     | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
 183     | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
 184
 185 list_command:
 186       tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
 187     | tLIST '-' tEOL           { DEBUG_List( NULL, NULL, -10 ); }
 188     | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
 189     | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
 190     | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
 191
 192 list_arg:
 193       tNUM                     { $$.sourcefile = NULL; $$.line = $1; }
 194     | pathname ':' tNUM        { $$.sourcefile = $1; $$.line = $3; }
 195     | tIDENTIFIER              { DEBUG_GetFuncInfo( & $$, NULL, $1); }
 196     | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
 197     | '*' expr_addr            { DEBUG_FindNearestSymbol( & $2, FALSE, NULL,
 198                                                         0, & $$ );
 199                                              DEBUG_FreeExprMem(); }
 200
 201 x_command:
 202       tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x');
 203                                              DEBUG_FreeExprMem(); }
 204     | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 205                                              DEBUG_FreeExprMem(); }
 206
 207 print_command:
 208       tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 );
 209                                              DEBUG_FreeExprMem(); }
 210     | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 211                                              DEBUG_FreeExprMem(); }
 212
 213 break_command:
 214       tBREAK '*' expr_addr tEOL { DEBUG_AddBreakpoint( &$3 );
 215                                              DEBUG_FreeExprMem(); }
 216     | tBREAK tIDENTIFIER tEOL  { DBG_ADDR addr;
 217                                  if( DEBUG_GetSymbolValue($2, -1, &addr, TRUE) )
 218                                    {
 219                                      DEBUG_AddBreakpoint( &addr );
 220                                    }
 221                                  else
 222                                    {
 223                                      fprintf(stderr,"Unable to add breakpoint\n");
 224                                    }
 225                                 }
 226     | tBREAK tIDENTIFIER ':' tNUM tEOL  { DBG_ADDR addr;
 227                                  if( DEBUG_GetSymbolValue($2, $4, &addr, TRUE) )
 228                                    {
 229                                      DEBUG_AddBreakpoint( &addr );
 230                                    }
 231                                  else
 232                                    {
 233                                      fprintf(stderr,"Unable to add breakpoint\n");
 234                                    }
 235                                 }
 236     | tBREAK tNUM tEOL         { struct name_hash *nh;
 237                                  DBG_ADDR addr = { NULL,
 238                                                    CS_reg(&DEBUG_context),
 239                                                    EIP_reg(&DEBUG_context) };
 240                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 241                                  if (ISV86(&DEBUG_context))
 242                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 243                                  DBG_FIX_ADDR_SEG( &addr, CS_reg(&DEBUG_context) );
 244                                  GlobalUnlock16( GetCurrentTask() );
 245                                  DEBUG_FindNearestSymbol(&addr, TRUE,
 246                                                          &nh, 0, NULL);
 247                                  if( nh != NULL )
 248                                    {
 249                                      DEBUG_GetLineNumberAddr(nh,
 250                                                       $2, &addr, TRUE);
 251                                      DEBUG_AddBreakpoint( &addr );
 252                                    }
 253                                  else
 254                                    {
 255                                      fprintf(stderr,"Unable to add breakpoint\n");
 256                                    }
 257                                }
 258
 259     | tBREAK tEOL              { DBG_ADDR addr = { NULL,
 260                                                    CS_reg(&DEBUG_context),
 261                                                    EIP_reg(&DEBUG_context) };
 262                                  TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 263                                  if (ISV86(&DEBUG_context))
 264                                      addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 265                                  GlobalUnlock16( GetCurrentTask() );
 266                                  DEBUG_AddBreakpoint( &addr );
 267                                }
 268
 269 info_command:
 270       tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
 271     | tINFO tCLASS expr_value tEOL    { CLASS_DumpClass( (CLASS *)$3 );
 272                                              DEBUG_FreeExprMem(); }
 273     | tINFO tSHARE tEOL         { DEBUG_InfoShare(); }
 274     | tINFO tMODULE expr_value tEOL   { NE_DumpModule( $3 );
 275                                              DEBUG_FreeExprMem(); }
 276     | tINFO tQUEUE expr_value tEOL    { QUEUE_DumpQueue( $3 );
 277                                              DEBUG_FreeExprMem(); }
 278     | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
 279     | tINFO tSEGMENTS expr_value tEOL { LDT_Print( SELECTOR_TO_ENTRY($3), 1 );
 280                                              DEBUG_FreeExprMem(); }
 281     | tINFO tSEGMENTS tEOL      { LDT_Print( 0, -1 ); }
 282     | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
 283     | tINFO tMAPS tEOL          { VIRTUAL_Dump(); }
 284     | tINFO tWND expr_value tEOL      { WIN_DumpWindow( $3 );
 285                                              DEBUG_FreeExprMem(); }
 286     | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
 287     | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
 288
 289 walk_command:
 290       tWALK tCLASS tEOL         { CLASS_WalkClasses(); }
 291     | tWALK tMODULE tEOL        { NE_WalkModules(); }
 292     | tWALK tQUEUE tEOL         { QUEUE_WalkQueues(); }
 293     | tWALK tWND tEOL           { WIN_WalkWindows( 0, 0 ); }
 294     | tWALK tWND tNUM tEOL      { WIN_WalkWindows( $3, 0 ); }
 295
 296
 297 type_cast:
 298       '(' type_expr ')'         { $$ = $2; }
 299
 300 type_expr:
 301       type_expr '*'             { $$ = DEBUG_FindOrMakePointerType($1); }
 302     |  tINT                     { $$ = DEBUG_TypeCast(DT_BASIC, "int"); }
 303     | tCHAR                     { $$ = DEBUG_TypeCast(DT_BASIC, "char"); }
 304     | tLONG tINT                { $$ = DEBUG_TypeCast(DT_BASIC, "long int"); }
 305     | tUNSIGNED tINT            { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned int"); }
 306     | tLONG tUNSIGNED tINT      { $$ = DEBUG_TypeCast(DT_BASIC, "long unsigned int"); }
 307     | tLONG tLONG tINT          { $$ = DEBUG_TypeCast(DT_BASIC, "long long int"); }
 308     | tLONG tLONG tUNSIGNED tINT { $$ = DEBUG_TypeCast(DT_BASIC, "long long unsigned int"); }
 309     | tSHORT tINT               { $$ = DEBUG_TypeCast(DT_BASIC, "short int"); }
 310     | tSHORT tUNSIGNED tINT     { $$ = DEBUG_TypeCast(DT_BASIC, "short unsigned int"); }
 311     | tSIGNED tCHAR             { $$ = DEBUG_TypeCast(DT_BASIC, "signed char"); }
 312     | tUNSIGNED tCHAR           { $$ = DEBUG_TypeCast(DT_BASIC, "unsigned char"); }
 313     | tFLOAT                    { $$ = DEBUG_TypeCast(DT_BASIC, "float"); }
 314     | tDOUBLE                   { $$ = DEBUG_TypeCast(DT_BASIC, "double"); }
 315     | tLONG tDOUBLE             { $$ = DEBUG_TypeCast(DT_BASIC, "long double"); }
 316     | tSTRUCT tIDENTIFIER       { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 317     | tUNION tIDENTIFIER        { $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
 318     | tENUM tIDENTIFIER         { $$ = DEBUG_TypeCast(DT_ENUM, $2); }
 319
 320 expr_addr:
 321     expr                         { $$ = DEBUG_EvalExpr($1); }
 322
 323 expr_value:
 324       expr        { DBG_ADDR addr  = DEBUG_EvalExpr($1);
 325                     $$ = addr.off ? *(unsigned int *) addr.off : 0; }
 326 /*
 327  * The expr rule builds an expression tree.  When we are done, we call
 328  * EvalExpr to evaluate the value of the expression.  The advantage of
 329  * the two-step approach is that it is possible to save expressions for
 330  * use in 'display' commands, and in conditional watchpoints.
 331  */
 332 expr:
 333       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 334     | tSTRING                    { $$ = DEBUG_StringExpr($1); }
 335     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 336     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 337     | expr OP_DRF tIDENTIFIER    { $$ = DEBUG_StructPExpr($1, $3); }
 338     | expr '.' tIDENTIFIER       { $$ = DEBUG_StructExpr($1, $3); }
 339     | tIDENTIFIER '(' ')'        { $$ = DEBUG_CallExpr($1, 0); }
 340     | tIDENTIFIER '(' expr ')'   { $$ = DEBUG_CallExpr($1, 1, $3); }
 341     | tIDENTIFIER '(' expr ',' expr ')'  { $$ = DEBUG_CallExpr($1, 2, $3,
 342                                                                $5); }
 343     | tIDENTIFIER '(' expr ',' expr ',' expr ')'         { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
 344     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'        { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9); }
 345     | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'       { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7, $9, $11); }
 346     | expr '[' expr ']'          { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 347     | expr ':' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
 348     | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
 349     | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
 350     | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
 351     | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
 352     | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
 353     | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
 354     | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
 355     | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
 356     | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
 357     | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
 358     | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
 359     | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
 360     | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
 361     | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
 362     | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
 363     | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
 364     | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
 365     | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
 366     | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
 367     | '+' expr %prec OP_SIGN     { $$ = $2; }
 368     | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
 369     | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
 370     | '(' expr ')'               { $$ = $2; }
 371     | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
 372     | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
 373     | type_cast expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($1, $2); }
 374
 375 /*
 376  * The lvalue rule builds an expression tree.  This is a limited form
 377  * of expression that is suitable to be used as an lvalue.
 378  */
 379 lval_addr:
 380     lval                         { $$ = DEBUG_EvalExpr($1); }
 381
 382 lval:
 383       lvalue                     { $$ = $1; }
 384     | '*' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
 385
 386 lvalue:
 387       tNUM                       { $$ = DEBUG_ConstExpr($1); }
 388     | tREG                       { $$ = DEBUG_RegisterExpr($1); }
 389     | tIDENTIFIER                { $$ = DEBUG_SymbolExpr($1); }
 390     | lvalue OP_DRF tIDENTIFIER  { $$ = DEBUG_StructPExpr($1, $3); }
 391     | lvalue '.' tIDENTIFIER     { $$ = DEBUG_StructExpr($1, $3); }
 392     | lvalue '[' expr ']'        { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
 393
 394 %%
 395
 396 void
 397 issue_prompt(){
 398 #ifdef DONT_USE_READLINE
 399         fprintf(stderr,"Wine-dbg>");
 400 #endif
 401 }
 402
 403 void mode_command(int newmode)
 404 {
 405     if ((newmode == 16) || (newmode == 32)) dbg_mode = newmode;
 406     else fprintf(stderr,"Invalid mode (use 16 or 32)\n");
 407 }
 408
 409
 410 /***********************************************************************
 411  *           DEBUG_Main
 412  *
 413  * Debugger main loop.
 414  */
 415 static void DEBUG_Main( int signal )
 416 {
 417     static int loaded_symbols = 0;
 418     static BOOL32 in_debugger = FALSE;
 419     char SymbolTableFile[256];
 420     int newmode;
 421     BOOL32 ret_ok;
 422 #ifdef YYDEBUG
 423     yydebug = 0;
 424 #endif
 425
 426     if (in_debugger)
 427     {
 428         fprintf( stderr, "Segmentation fault inside debugger, exiting.\n" );
 429         exit(1);
 430     }
 431     in_debugger = TRUE;
 432     yyin = stdin;
 433
 434     DEBUG_SetBreakpoints( FALSE );
 435
 436     if (!loaded_symbols)
 437     {
 438         loaded_symbols++;
 439
 440         /*
 441          * Initialize the type handling stuff.
 442          */
 443         DEBUG_InitTypes();
 444
 445         /*
 446          * In some cases we can read the stabs information directly
 447          * from the executable.  If this is the case, we don't need
 448          * to bother with trying to read a symbol file, as the stabs
 449          * also have line number and local variable information.
 450          * As long as gcc is used for the compiler, stabs will
 451          * be the default.  On SVr4, DWARF could be used, but we
 452          * don't grok that yet, and in this case we fall back to using
 453          * the wine.sym file.
 454          */
 455         if( DEBUG_ReadExecutableDbgInfo() == FALSE )
 456         {
 457             char *symfilename = "wine.sym";
 458             struct stat statbuf;
 459             if (-1 == stat(symfilename, &statbuf) )
 460                 symfilename = LIBDIR "wine.sym";
 461
 462             PROFILE_GetWineIniString( "wine", "SymbolTableFile", symfilename,
 463                                      SymbolTableFile, sizeof(SymbolTableFile));
 464             DEBUG_ReadSymbolTable( SymbolTableFile );
 465         }
 466
 467         DEBUG_LoadEntryPoints();
 468         DEBUG_ProcessDeferredDebug();
 469     }
 470
 471 #if 0
 472     fprintf(stderr, "Entering debugger  PC=%x, mode=%d, count=%d\n",
 473             EIP_reg(&DEBUG_context),
 474             dbg_exec_mode, dbg_exec_count);
 475
 476     sleep(1);
 477 #endif
 478
 479     if ((signal != SIGTRAP) || !DEBUG_ShouldContinue( dbg_exec_mode,
 480                                                       &dbg_exec_count ))
 481     {
 482         DBG_ADDR addr;
 483         TDB *pTask = (TDB*)GlobalLock16( GetCurrentTask() );
 484
 485         addr.seg = CS_reg(&DEBUG_context);
 486         addr.off = EIP_reg(&DEBUG_context);
 487         if (ISV86(&DEBUG_context)) addr.seg |= (DWORD)(pTask?(pTask->hModule):0)<<16;
 488         addr.type = NULL;
 489         DBG_FIX_ADDR_SEG( &addr, 0 );
 490
 491         GlobalUnlock16( GetCurrentTask() );
 492
 493         /* Put the display in a correct state */
 494
 495         TSXUngrabServer( display );
 496         TSXFlush( display );
 497
 498         newmode = ISV86(&DEBUG_context) ? 16 : IS_SELECTOR_32BIT(addr.seg) ? 32 : 16;
 499         if (newmode != dbg_mode)
 500             fprintf(stderr,"In %d bit mode.\n", dbg_mode = newmode);
 501
 502         PROCESS_SuspendOtherThreads();
 503
 504         DEBUG_DoDisplay();
 505
 506         if (signal != SIGTRAP)  /* This is a real crash, dump some info */
 507         {
 508             DEBUG_InfoRegisters();
 509             DEBUG_InfoStack();
 510             if (dbg_mode == 16)
 511             {
 512                 LDT_Print( SELECTOR_TO_ENTRY(DS_reg(&DEBUG_context)), 1 );
 513                 if (ES_reg(&DEBUG_context) != DS_reg(&DEBUG_context))
 514                     LDT_Print( SELECTOR_TO_ENTRY(ES_reg(&DEBUG_context)), 1 );
 515             }
 516             DEBUG_BackTrace();
 517         }
 518         else
 519         {
 520           /*
 521            * Do a quiet backtrace so that we have an idea of what the situation
 522            * is WRT the source files.
 523            */
 524             DEBUG_SilentBackTrace();
 525         }
 526
 527         if ((signal != SIGTRAP) ||
 528             (dbg_exec_mode == EXEC_STEPI_OVER) ||
 529             (dbg_exec_mode == EXEC_STEPI_INSTR))
 530         {
 531             /* Show where we crashed */
 532             curr_frame = 0;
 533             DEBUG_PrintAddress( &addr, dbg_mode, TRUE );
 534             fprintf(stderr,":  ");
 535             if (DBG_CHECK_READ_PTR( &addr, 1 ))
 536               {
 537                 DEBUG_Disasm( &addr, TRUE );
 538                 fprintf(stderr,"\n");
 539               }
 540         }
 541
 542         ret_ok = 0;
 543         do
 544         {
 545             issue_prompt();
 546             yyparse();
 547             flush_symbols();
 548             addr.seg = CS_reg(&DEBUG_context) | (addr.seg&0xffff0000);
 549             addr.off = EIP_reg(&DEBUG_context);
 550             DBG_FIX_ADDR_SEG( &addr, 0 );
 551             ret_ok = DEBUG_ValidateRegisters();
 552             if (ret_ok) ret_ok = DBG_CHECK_READ_PTR( &addr, 1 );
 553         } while (!ret_ok);
 554     }
 555
 556     dbg_exec_mode = DEBUG_RestartExecution( dbg_exec_mode, dbg_exec_count );
 557     /*
 558      * This will have gotten absorbed into the breakpoint info
 559      * if it was used.  Otherwise it would have been ignored.
 560      * In any case, we don't mess with it any more.
 561      */
 562     if( dbg_exec_mode == EXEC_CONT )
 563       {
 564         dbg_exec_count = 0;
 565         PROCESS_ResumeOtherThreads();
 566       }
 567
 568     in_debugger = FALSE;
 569 }
 570
 571
 572
 573 /***********************************************************************
 574  *           DebugBreak   (KERNEL.203) (KERNEL32.181)
 575  */
 576 void DebugBreak( CONTEXT *regs )
 577 {
 578     char module[10];
 579     if (!GetModuleName( GetCurrentTask(), module, sizeof(module) ))
 580         strcpy( module, "???" );
 581     fprintf( stderr, "%s called DebugBreak\n", module );
 582     DEBUG_context = *regs;
 583     DEBUG_Main( SIGTRAP );
 584 }
 585
 586
 587 void ctx_debug( int signal, CONTEXT *regs )
 588 {
 589     DEBUG_context = *regs;
 590     DEBUG_Main( signal );
 591     *regs = DEBUG_context;
 592 }
 593
 594 void wine_debug( int signal, SIGCONTEXT *regs )
 595 {
 596 #if 0
 597     DWORD *stack = (DWORD *)ESP_sig(regs);
 598     *(--stack) = 0;
 599     *(--stack) = 0;
 600     *(--stack) = EH_NONCONTINUABLE;
 601     *(--stack) = EXCEPTION_ACCESS_VIOLATION;
 602     *(--stack) = EIP_sig(regs);
 603     ESP_sig(regs) = (DWORD)stack;
 604     EIP_sig(regs) = (DWORD)RaiseException;
 605 #else
 606     DEBUG_SetSigContext( regs );
 607     DEBUG_Main( signal );
 608     DEBUG_GetSigContext( regs );
 609 #endif
 610 }
 611
 612 int yyerror(char * s)
 613 {
 614         fprintf(stderr,"%s\n", s);
 615         return 0;
 616 }